Gun Peggy Strømstad Knudsen

Projects and publications

Øyvind Helgeland, Marc Vaudel, Pol Sole-Navais, Christopher Flatley, Julius Juodakis, Jonas Bacelis, Ingvild Koløen, Gun Peggy Strømstad Knudsen, Bente Berg Johansson, Per Minor Magnus, Ted Reichborn-Kjennerud, Pétur Benedikt Juliusson, Camilla Stoltenberg, Oddgeir Lingaas Holmen, Ole Andreassen, Bo Jacobsson, Pål Rasmus Njølstad, Stefan Johansson, (2022). Characterization of the genetic architecture of infant and early childhood body mass index. Nature Metabolism s. 344-358. doi: 10.1038/s42255-022-00549-1
Elizabeth M. Kamai, Gro Dehli Villanger, Rachel C. Nethery, Cathrine Thomsen, Amrit Kaur Sakhi, Samantha S.M. Drover, Jane A. Hoppin, Gun Peggy Strømstad Knudsen, Ted Reichborn-Kjennerud, Pål Zeiner, Kristin Romvig Øvergaard, Amy H. Herring, Heidi Aase, Stephanie M. Engel, (2021). Gestational Phthalate Exposure and Preschool Attention Deficit Hyperactivity Disorder in Norway. Environmental Epidemiology doi: 10.1097/EE9.0000000000000161
Hill F. Ip, Camiel M. van der Laan, Eva M. L. Krapohl, Isabell Brikell, Cristina Sánchez-Mora, Ilja M. Nolte, Beate St Pourcain, Koen Bolhuis, Teemu Palviainen, Hadi Zafarmand, Lucía Colodro-Conde, Scott Gordon, Tetyana Zayats, Fazil Aliev, Chang Jiang, Carol A. Wang, Gretchen Saunders, Ville Karhunen, Anke R. Hammerschlag, Daniel E. Adkins, Richard Border, Roseann E. Peterson, Joseph A. Prinz, Elisabeth Thiering, Iikka Seppälä, Natàlia Vilor-Tejedor, Tarunveer S. Ahluwalia, Felix R. Day, Jouke-Jan Hottenga, Andrea G. Allegrini, Kaili Rimfeld, Qi Chen, Lu Yi, Joanna Martin, Marìa Soler Artigas, Paula Rovira, Rosa Bosch, Gemma Español, Josep Antonio Ramos-Quiroga, Alexander Neumann, Jan Haavik, Jennifer Ruth Harris, Øyvind Helgeland, Stefan Johansson, Gun Peggy Strømstad Knudsen, Pål Rasmus Njølstad, Alexandra Havdahl, Per Minor Magnus, Ted Reichborn-Kjennerud, Dorret I. Boomsma, (2021). Genetic association study of childhood aggression across raters, instruments, and age. Translational Psychiatry s. 1-9. doi: 10.1038/s41398-021-01480-x
Aage Tverdal, Gudrun Høiseth, Per Magnus, Øyvind Næss, Randi Selmer, Gun Peggy Knudsen, Jørg Mørland, (2021). Alcohol Consumption, HDL-Cholesterol and Incidence of Colon and Rectal Cancer: A Prospective Cohort Study including 250,010 Participants. Alcohol and Alcoholism s. 718-725. doi: 10.1093/alcalc/agab007
Giehae Choi, Gro Dehli Villanger, Samantha S.M. Drover, Amrit Kaur Sakhi, Cathrine Thomsen, Rachel C. Nethery, Pål Zeiner, Gun Peggy Strømstad Knudsen, Ted Reichborn-Kjennerud, Kristin Romvig Øvergaard, Amy H. Herring, Annette Holth Skogan, Guido Biele, Heidi Aase, Stephanie M. Engel, (2021). Prenatal phthalate exposures and executive function in preschool children. Environment International doi: 10.1016/j.envint.2021.106403
Julien Bryois, Nathan G. Skene, Thomas Folkmann Hansen, Lisette J.A. Kogelman, Hunna J. Watson, Zijing Liu, Roger Adan, Lars Alfredsson, Tetsuya Ando, Ole Andreas Andreassen, Jessica Baker, Andrew Bergen, Wade Berrettini, Andreas Birgegård, Joseph Boden, Ilka Boehm, Gun Peggy Strømstad Knudsen, Maria C La Via, Mikael Landén, Janne Larsen, Stephanie Francoise Claire Le Hellard, Virpi Leppa, Nicholas Martin, Manuel Mattheisen, Morten Mattingsdal, Sara McDevitt, Ted Reichborn-Kjennerud, Valdo Ricca, Samuli Ripatti, Stephan Ripke, Stephan Zipfel, Verneri Antilla, Ville Artto, Andrea Carmine Belin, Irene de Boer, Dorret I. Boomsma, Sigrid Børte, Linda Margareth Pedersen, Nancy Pedersen, Danielle Posthuma, Maija Wessmann, Bendik K S Winsvold, Huiying Zhao, John-Anker Zwart, Leo Brueggeman, Gerome Breen, Cynthia M. Bulik, Ernest Arenas, Jens Hjerling-Leffler, Patrick F. Sullivan, (2020). Genetic identification of cell types underlying brain complex traits yields insights into the etiology of Parkinson’s disease. Nature Genetics s. 482-493. doi: 10.1038/s41588-020-0610-9
Dinka Smajlagic, Ksenia Lavrichenko, Siren Berland, Øyvind Helgeland, Gun Peggy Strømstad Knudsen, Marc Vaudel, Jan Haavik, Per Knappskog, Pål Rasmus Njølstad, Gunnar Houge, Stefan Johansson, (2020). Population prevalence and inheritance pattern of recurrent CNVs associated with neurodevelopmental disorders in 12,252 newborns and their parents. European Journal of Human Genetics s. 205-215. doi: 10.1038/s41431-020-00707-7
Melissa A. Munn-Chernoff, Emma C. Johnson, Yi-Ling Chou, Jonathan R.I. Coleman, Laura M. Thornton, Raymond K. Walters, Zeynep Yilmaz, Jessica H. Baker, Christopher Hübel, Scott Gordon, Sarah E. Medland, Hunna J. Watson, Héléna A. Gaspar, Julien Bryois, Anke Hinney, Virpi M. Leppä, Manuel Mattheisen, Stephan Ripke, Shuyang Yao, Paola Giusti-Rodríguez, Ken B. Hanscombe, Roger A.H. Adan, Lars Alfredsson, Tetsuya Ando, Ole Andreas Andreassen, Wade H. Berrettini, Ilka Boehm, Claudette Boni, Vesna Boraska Perica, Katharina Buehren, Roland Burghardt, Matteo Cassina, Sven Cichon, Maurizio Clementi, Roger D. Cone, Philippe Courtet, Scott Crow, James J. Crowley, Unna N. Danner, Oliver S.P. Davis, Martina de Zwaan, George Dedoussis, Daniela Degortes, Janiece E. DeSocio, Danielle M. Dick, Dimitris Dikeos, Christian Dina, Monika Dmitrzak-Weglarz, Elisa Docampo, Laramie E. Duncan, Karin Egberts, Stefan Ehrlich, Geòrgia Escaramis, Tõnu Esko, Xavier Estivill, Anne Farmer, Angela Favaro, Fernando Fernández-Aranda, Manfred M. Fichter, Krista Fischer, Manuel Föcker, Lenka Foretova, Andreas J. Forstner, Monica Forzan, Christopher S. Franklin, Steven Gallinger, Ina Giegling, Johanna Giuranna, Fragiskos Gonidakis, Philip Gorwood, Monica Gratacos Mayora, Sebastien Guillaume, Yiran Guo, Hákon H. Hákonarson, Konstantinos Hatzikotoulas, Joanna Hauser, Johannes Hebebrand, Sietske G. Helder, Stefan Herms, Beate Herpertz-Dahlmann, Wolfgang Herzog, Laura M. Huckins, James I. Hudson, Hartmut Imgart, Hidetoshi Inoko, Vladimir Janout, Susana Jiménez-Murcia, Antonio Julià, Gursharan Kalsi, Deborah Kaminská, Leila Karhunen, Andreas Karwautz, Martien J.H. Kas, James L. Kennedy, Anna Keski-Rahkonen, Kirsty Kiezebrink, Youl-Ri Kim, Kelly L. Klump, Gun Peggy Strømstad Knudsen, Maria C. La Via, (2020). Shared genetic risk between eating disorder‐ and substance‐use‐related phenotypes: Evidence from genome‐wide association studies. Addiction Biology doi: 10.1111/adb.12880
Phil H. Lee, Verneri Antilla, Hyejung Won, Yen-Chen A. Feng, Jacob Rosenthal, Zhaozhong Zhu, Elliot M. Tucker-Drob, Michel G. Nivard, Andrew D. Grotzinger, Danielle Posthuma, Dongmei Yu, Eli A. Stahl, Raymond K. Walters, Richard J.L. Anney, Laramie E. Duncan, Tian Ge, Sintia I. Belangero, Edwin H. Cook, Pieter J. Hoekstra, Anna Keski-Rahkonen, George Kirov, Jurjen J. Luykx, Luis A. Rohde, Esben Agerbo, M.J. Arranz, Philip Asherson, Marie Bækvad-Hansen, Mark A. Bellgrove, Richard A. Belliveau Jr, Jan Buitelaar, Jonas Bybjerg-Grauholm, Miquel Casas, Kimberly Chambert, Felecia Cerrato, Claire Churchhouse, Bru Cormand, Jennifer Crosbie, Søren Dalsgaard, Jan Haavik, Hakon Hakonarson, Christine S. Hansen, Ole Mors, Tetyana Zayats, Francesco Bettella, Sigrun Hope, Christina M. Hultman, Terje Nærland, Erlend Bøen, Torbjørn Elvsåshagen, Ketil Joachim Ødegaard, Ulrik Fredrik Malt, Ingrid Melle, Céline Sonja Reinbold, Olav Bjerkehagen Smeland, Yunpeng Wang, Thomas Espeseth, Gun Peggy Strømstad Knudsen, Stephanie Le Hellard, Ted Reichborn-Kjennerud, Erik Gunnar Jönsson, Ole Andreas Andreassen, Ingrid Agartz, Gunnar Morken, Eystein Stordal, Arne Vaaler, Inge Joa, (2019). Genomic Relationships, Novel Loci, and Pleiotropic Mechanisms across Eight Psychiatric Disorders. Cell s. 1469-1482. doi: 10.1016/j.cell.2019.11.020
Kevin O`Connell, Alexey A. Shadrin, Olav Bjerkehagen Smeland, Shahram Bahrami, Oleksandr Frei, Francesco Bettella, Florian Krull, Chun C. Fan, Ragna Bugge Askeland, Gun Peggy Strømstad Knudsen, Anne Halmøy, Nils Eiel Steen, Torill Ueland, G. Bragi Walters, Katrín Davíðsdóttir, Gyda S. Haraldsdóttir, Ólafur Guðmundsson, Hreinn Stefansson, Ted Reichborn-Kjennerud, Jan Haavik, Anders M. Dale, Kári Stefánsson, Srdjan Djurovic, Ole Andreas Andreassen, (2019). Identification of genetic loci shared between ADHD, intelligence and educational attainment . Biological Psychiatry s. 1052-1062. doi: 10.1016/j.biopsych.2019.11.015
Ólafur Ó. Gudmundsson, Gudmundur Bragi Walters, Andrés Ingason, Stefan Johansson, Tetyana Zayats, Lavinia Athanasiu, Ida Elken Sønderby, Omar Gustafsson, Muhammad Sulaman Nawaz, Gudbjörn F. Jónsson, Lina Jónsson, Per Knappskog, Ester Ingvarsdóttir, Katrin Davidsdóttir, Srdjan Djurovic, Gun Peggy Strømstad Knudsen, Ragna Bugge Askeland, Gyda S. Haraldsdóttir, Gísli Baldursson, Páll Magnússon, Engilbert Sigurdsson, Daníel Fannar Gudbjartsson, Hreinn Stéfansson, Ole Andreas Andreassen, Jan Haavik, Ted Reichborn-Kjennerud, Kári Stefánsson, (2019). Attention-deficit hyperactivity disorder shares copy number variant risk with schizophrenia and autism spectrum disorder. Translational Psychiatry s. 1-9. doi: 10.1038/s41398-019-0599-y
Øyvind Helgeland, Marc Vaudel, Petur Benedikt Juliusson, Oddgeir Lingaas Holmen, Julius Juodakis, Jonas Bacelis, Bo Jacobsson, Haakon Lindekleiv, Kristian Hveem, Rolv T. Lie, Gun Peggy Strømstad Knudsen, Camilla Stoltenberg, Per Magnus, Jørn V. Sagen, Anders Molven, Stefan Johansson, Pål Rasmus Njølstad, (2019). Genome-wide association study reveals dynamic role of genetic variation in infant and early childhood growth. Nature Communications s. 1-10. doi: 10.1038/s41467-019-12308-0
Inger Johanne Landsjøåsen Bakken, Anja Maria Steinsland Ariansen, Gun Peggy S. Knudsen, Knut Ivar Johansen, Stein Emil Vollset, (2019). The Norwegian Patient Registry and the Norwegian Registry for Primary Health Care: Research potential of two nationwide healthcare registries. Scandinavian Journal of Public Health s. 1-7. doi: 10.1177/1403494819859737
Hunna J. Watson, Zeynep Yilmaz, Laura M. Thornton, Christopher Hübel, Jonathan R. I. Coleman, Héléna A. Gaspar, Julien Bryois, Anke Hinney, Virpi M. Leppä, Manuel Mattheisen, Sarah E. Medland, Stephan Ripke, Shuyang Yao, Paola Giusti-Rodríguez, Ken B. Hanscombe, Kirstin L. Purves, Roger A.H. Adan, Lars Alfredsson, Tetsuya Ando, Ole Andreas Andreassen, Jessica H Baker, Wade H. Berrettini, Ilka Boehm, Claudette Boni, Vesna Boraska Perica, Katharina Buehren, Roland Burghardt, Matteo Cassina, Sven Cichon, Maurizio Clementi, Roger D. Cone, Philippe Courtet, Scott Crow, James J. Crowley, Unna N. Danner, Oliver S.P. Davis, Martina de Zwaan, George Dedoussis, Daniela Degortes, Janiece E. DeSocio, Danielle M. Dick, Dimitris Dikeos, Christian Dina, Monika Dmitrzak-Weglarz, Elisa Docampo, Laramie E. Duncan, Karin Egberts, Stefan Ehrlich, Geòrgia Escaramis, Tõnu Esko, Xavier Estivill, Anne Farmer, Angela Favaro, Fernando Fernández-Aranda, Manfred M. Fichter, Krista Fischer, Manuel Föcker, Lenka Foretova, Andreas J. Forstner, Monica Forzan, Christopher S. Franklin, Steven Gallinger, Ina Giegling, Johanna Giuranna, Fragiskos Gonidakis, Philip Gorwood, Monica Gratacos Mayora, Sebastien Guillaume, Yiran Guo, Hakon Hakonarson, Konstantinos Hatzikotoulas, Joanna Hauser, Johannes Hebebrand, Sietske G. Helder, Stefan Herms, Beate Herpertz-Dahlmann, Wolfgang Herzog, Laura M. Huckins, James I. Hudson, Hartmut Imgart, Hidetoshi Inoko, Vladimir Janout, Susana Jiménez-Murcia, Antonio Julià, Gursharan Kalsi, Deborah Kaminská, Jaakko Kaprio, Leila Karhunen, Andreas Karwautz, Martien J.H. Kas, James L. Kennedy, Anna Keski-Rahkonen, Kirsty Kiezebrink, Youl-Ri Kim, Lars Klareskog, Kelly L. Klump, Gun Peggy S. Knudsen, Maria C. La Via, Stephanie Le Hellard, Robert D. Levitan, (2019). Genome-wide association study identifies eight risk loci and implicates metabo-psychiatric origins for anorexia nervosa. Nature Genetics s. 1207-1214. doi: 10.1038/s41588-019-0439-2
Kristin Gustavson, Helga Ask, Eivind Ystrøm, Camilla Stoltenberg, W. Ian Lipkin, Pål Suren, Siri Eldevik Håberg, Per Magnus, Gun Peggy S. Knudsen, Espen Moen Eilertsen, Michaeline Bresnahan, Heidi Aase, Siri Mjaaland, Ezra S. Susser, Mady Hornig, Ted Reichborn-Kjennerud, (2019). Maternal fever during pregnancy and offspring attention deficit hyperactivity disorder. Scientific Reports s. 1-10. doi: 10.1038/s41598-019-45920-7
Hunna J Watson, Elizabeth W Diemer, Stephanie Zerwas, Kristin Gustavson, Gun Peggy S. Knudsen, Leila Torgersen, Ted Reichborn-Kjennerud, Cynthia M Bulik, (2019). Prenatal and perinatal risk factors for eating disorders in women: A population cohort study. International Journal of Eating Disorders s. 643-651. doi: 10.1002/eat.23073
Francesca Giannese, Alessandra Luchetti, Giulia Barbiera, Valentina Lampis, Claudio Zanettini, Gun Peggy S. Knudsen, Simona Scaini, Dejan Lazarevic, Davide Cittaro, Francesca R. D'Amato, Marco Battaglia, (2018). Conserved DNA Methylation Signatures in Early Maternal Separation and in Twins Discordant for CO2 Sensitivity. Scientific Reports doi: 10.1038/s41598-018-20457-3
Samantha S.M. Drover, Gro Dehli Villanger, Heidi Aase, Thea Steen Skogheim, Matthew P. Longnecker, R. Thomas Zoeller, Ted Reichborn-Kjennerud, Gun Peggy S. Knudsen, Pål Zeiner, Stephanie M. Engel, (2018). Maternal thyroid function during pregnancy or neonatal thyroid function and attention deficit hyperactivity disorder: A systematic review. Epidemiology s. 130-144. doi: 10.1097/EDE.0000000000000937
Nathan A. Gillespie, Steven H. Aggen, Amanda E. Gentry, Michael Churton Neale, Gun Peggy S. Knudsen, Robert Frederick Krueger, Susan Carol South, Nikolai Olavi Czajkowski, Ragnar Nesvåg, Eivind Ystrøm, Tom Henrik Rosenström, Fartein Ask Torvik, Ted Reichborn-Kjennerud, Kenneth Seedman Kendler, (2018). Testing Genetic and Environmental Associations Between Personality Disorders and Cocaine Use: A Population-Based Twin Study. Twin Research and Human Genetics s. 24-32. doi: 10.1017/thg.2017.73
Nathan A. Gillespie, Steven H. Aggen, Michael C. Neale, Gun Peggy S. Knudsen, Robert F. Krueger, Susan C. South, Nikolai Olavi Czajkowski, Ragnar Nesvåg, Eivind Ystrøm, Kenneth S. Kendler, Ted Reichborn-Kjennerud, (2018). Associations between personality disorders and cannabis use and cannabis use disorder: a population‐based twin study. Addiction s. 1488-1498. doi: 10.1111/add.14209
Audun Welander-Vatn, Fartein Ask Torvik, Nikolai Olavi Czajkowski, Kenneth S Kendler, Ted Reichborn-Kjennerud, Gun Peggy S. Knudsen, Eivind Ystrøm, (2018). Relationships Among Avoidant Personality Disorder, Social Anxiety Disorder, and Normative Personality Traits: A Twin Study. Journal of Personality Disorders s. 289-309. doi: 10.1521/pedi_2018_32_341
Kristin Gustavson, Ann Kristin Knudsen, Ragnar Nesvåg, Gun Peggy S. Knudsen, Stein Emil Vollset, Ted Reichborn-Kjennerud, (2018). Prevalence and stability of mental disorders among young adults: Findings from a longitudinal study. BMC Psychiatry doi: 10.1186/s12888-018-1647-5
Stephanie M. Engel, Gro Dehli Villanger, Rachel C. Nethery, Cathrine Thomsen, Amrit Kaur Sakhi, Samantha S.M. Drover, Jane A. Hoppin, Pål Zeiner, Gun Peggy S. Knudsen, Ted Reichborn-Kjennerud, Amy H. Herring, Heidi Aase, (2018). Prenatal Phthalates, Maternal Thyroid Function, and Risk of Attention-Deficit Hyperactivity Disorder in the Norwegian Mother and Child Cohort. Environmental Health Perspectives doi: 10.1289/EHP2358
Kristine B Walhovd, Anders Martin Fjell, René Westerhausen, L Nyberg, K P Ebmeier, U Lindenberger, D Bartres-Faz, W F C Baare, H R Siebner, R Henson, C A Drevon, Gun Peggy S. Knudsen, Isabelle Budin Ljøsne, B W J H Penninx, P Ghisletta, Ole Røgeberg, L Tyler, L Bertram, (2018). Healthy minds 0-100 years: Optimising the use of European brain imaging cohorts ("Lifebrain"). European psychiatry s. 47-56. doi: 10.1016/j.eurpsy.2017.12.006
L M Huckins, K Hatzikotoulas, L Southam, L M Thornton, J Steinberg, F Aguilera-McKay, J Treasure, U Schmidt, C Gunasinghe, A Romero, C Curtis, D Rhodes, J Moens, G Kalsi, D Dempster, R Leung, A Keohane, R Burghardt, S Ehrlich, J Hebebrand, A Hinney, A Ludolph, E Walton, P Deloukas, A Hofman, A Palotie, P Palta, F J A van Rooij, K Stirrups, R Adan, C Boni, R Cone, G Dedoussis, E van Furth, F Gonidakis, P Gorwood, J Hudson, J Kaprio, M Kas, A Keski-Rahonen, K Kiezebrink, Gun Peggy Knudsen, M C T Slof-Op ’t Landt, M Maj, A Monteleone, P Monteleone, A Raevuori, Ted Reichborn-Kjennerud, F Tozzi, A Tsitsika, A Van Elburg, D A Collier, P F Sullivan, G Breen, C M Bulik, E Zeggini, (2018). Investigation of common, low-frequency and rare genome-wide variation in anorexia nervosa. Molecular Psychiatry s. 1169-1180. doi: 10.1038/mp.2017.88
Sigurgeir Olafsson, S. Olafsson, Pernilla Stridh, P. Stridh, Steffan Daniel Bos, Andrés Ingason, Andres Ingason, J Euesden, Jack Euesden, Patrick Sulem, Gudmar Thorleifsson, O Gustafsson, Omar Gustafsson, AJ Geirsson, Ari J. Jóhannesson, Arni J. Geirsson, AV Thorsson, Arni V. Thorsson, BR Ludviksson, Bardur Sigurgeirsson, Elias Olafsson, JG Jonasson, Helga Kristjansdottir, E Olafsson, Jon G. Jonasson, H Kristjansdottir, JH Olafsson, Jón Hjaltalín Ólafsson, KB Orvar, Rafn Benediktsson, Ragnar Bjarnason, Sjofn Kristjansdottir, Thorarin Gislason, Thorarinn Gislason, T Valdimarsson, E Mikaelsdottir, S Sigurdsson, Snaevar Sigurdsson, S Jonsson, Stefan Jonsson, Thorunn Rafnar, Dag Aarsland, Srdjan Djurovic, Tormod Fladby, Gun Peggy S. Knudsen, Elisabeth Gulowsen Celius, Kjell-Morten Myhr, Gerdur Gröndal, K Steinsson, Kristjan Steinsson, Helgi Valdimarsson, Sigurdur Bjornsson, US Bjornsdottir, Unnur S. Bjornsdottir, Einar S. Bjornsson, Björn Nilsson, B Nilsson, Ole Andreas Andreassen, Lars Alfredsson, Jan Hillert, Ingrid Kockum, Gísli Másson, Gisli Masson, U Thorsteinssdottir, Kári Stefánsson, Daniel F. Gudbjartsson, H Stefansson, H Hjaltason, Hanne Flinstad Harbo, T Olsson, I Jonsdottir, K Stefansson, (2017). Fourteen sequence variants that associate with multiple sclerosis discovered by meta-analysis informed by genetic correlations. NPJ GENOMIC MEDICINE doi: 10.1038/s41525-017-0027-2
Fartein Ask Torvik, Tom Henrik Rosenström, Eivind Ystrøm, Kristian Tambs, Espen Røysamb, Nikolai Olavi Czajkowski, Nathan Gillespie, Gun Peggy Knudsen, Kenneth S. Kendler, Ted Reichborn-Kjennerud, (2017). Stability and change in etiological factors for alcohol use disorder and major depression. Journal of Abnormal Psychology s. 812-822. doi: 10.1037/abn0000280
Eivind Ystrøm, Kristin Gustavson, Ragnhild Eek Brandlistuen, Gun Peggy Knudsen, Per Magnus, Ezra Susser, George Davey Smith, Camilla Stoltenberg, Pål Surén, Siri Eldevik Håberg, Mady Hornig, W. Ian Lipkin, Hedvig Marie Egeland Nordeng, Ted Reichborn-Kjennerud, (2017). Prenatal exposure to acetaminophen and risk of ADHD. Pediatrics s. 1-11. doi: 10.1542/peds.2016-3840
Dong Li, Xiao Chang, John J. Connolly, Lifeng Tian, Yichuan Liu, Elizabeth J. Bhoj, Nora Robinson, Debra Abrams, Yun R. Li, Jonathan P. Bradfield, Cecilia E. Kim, Jin Li, Fengxiang Wang, James Snyder, Maria Lemma, Cuiping Hou, Zhi Wei, Yiran Guo, Haijun Qiu, Frank D. Mentch, Kelly A. Thomas, Rosetta M. Chiavacci, Roger Cone, Bingshan Li, Patrick A. Sleiman, Hakon Hakonarson, Ted Reichborn-Kjennerud, Gun Peggy Knudsen, Ole Andreas Andreassen, Thomas Espeseth, Laura M Huckins, Ivar Reinvang, Vidar Martin Steen, Stephanie Le Hellard, Morten Mattingsdal, Federica Tozzi, Kirsty Kiezebrink, Johannes Hebebrand, Philip Gorwood, Roger A H Adan, Martien J H Kas, Angela Favaro, Paolo Santonastaso, Fernando Fernande-Aranda, Monica Gratacos, Filip Rybakowski, Monika Dmitrzak-Weglarz, Jaakko Kaprio, Anna Keski-Rahkonen, Anu Raevuori-Helkamaa, Eric F Van Furth, Margarita C T Slof-Opt Landt, James I Hudson, Ted Reichborn-Kjennerud, Gun Peggy S Knudsen, Palmiero Monteleone, Andreas Karwautz, Wade H Berrettini, Nicholas J Schork, Tetsuya Ando, Hidetoshi Inoko, Tonu Esko, Krista Fischer, Katrin Mannik, Andres Metspalu, Jessica H Baker, Janiece E DeSocio, Christopher E Hilliard, Julie K O'Toole, Jacques Pantel, Jin P Szatkiewicz, Stephanie Zerwas, Oliver S P Davis, Sietske Helder, Katharina Buhren, Roland Burghardt, Martina De Zwaan, Karin Egberts, Stefan Ehrlich, Beate Herpertz-Dahlmann, Wolfgang Herzog, Hartmut Imgart, Andre Scherag, Stephan Zipfel, Claudette Boni, Nicolas Ramoz, Audrey Versini, Unna N Danner, Judith Hendriks, Bobby P C Koeleman, Roel A Ophoff, Eric Strengman, Annemarie A Van Elburg, Alice Bruson, Maurizio Clementi, Daniela Degortes, Monica Forzan, Elena Tenconi, Elisa Docampo, Georgia Escaramis, (2017). A genome-wide association study of anorexia nervosa suggests a risk locus implicated in dysregulated leptin signaling. Scientific Reports s. 1-9. doi: 10.1038/s41598-017-01674-8
Hunna J Watson, Leila Torgersen, Elizabeth W Diemer, Ted Reichborn-Kjennerud, Stephanie Zerwas, Kristin Gustavson, Gun Peggy Knudsen, Cynthia M Bulik, (2017). Maternal Eating Disorders and Perinatal Outcomes: A Three-Generation Study in the Norwegian Mother and Child Cohort Study. Journal of Abnormal Psychology s. 552-564. doi: 10.1037/abn0000241
Karoline Brobakke Seglem, Ragnhild Ørstavik, Fartein Ask Torvik, Line C. Gjerde, Espen Røysamb, Ted Reichborn-Kjennerud, Gun Peggy Knudsen, Kristian Tambs, (2017). Pre-pregnancy mental distress and musculoskeletal pain and sickness absence during pregnancy-a twin cohort study. European Journal of Public Health s. 477-481. doi: 10.1093/eurpub/ckw267
Ted Reichborn-Kjennerud, R F Krueger, Eivind Ystrøm, Fartein Ask Torvik, Tom Henrik Rosenström, S H Aggen, S C South, M C Neale, Gun Peggy Knudsen, K S Kendler, Nikolai Olavi Czajkowski, (2017). Do DSM-5 Section II personality disorders and Section III personality trait domains reflect the same genetic and environmental risk factors?. Psychological Medicine s. 2205-2215. doi: 10.1017/S0033291717000824
Espen Moen Eilertsen, Line C. Gjerde, Ted Reichborn-Kjennerud, Ragnhild Ørstavik, Gun Peggy Knudsen, Camilla Stoltenberg, Nikolai Olavi Czajkowski, Espen Røysamb, Kenneth S Kendler, Eivind Ystrøm, (2017). Maternal alcohol use during pregnancy and offspring attention-deficit hyperactivity disorder (ADHD): a prospective sibling control study. International Journal of Epidemiology s. 1633-1640. doi: 10.1093/ije/dyx067
Elizabeth C. Long, Steven H. Aggen, Michael Churton Neale, Gun Peggy Knudsen, Robert Frederick Krueger, Susan Carol South, Nikolai Olavi Czajkowski, Ragnar Nesvåg, Eivind Ystrøm, Fartein Ask Torvik, Kenneth Seedman Kendler, Nathan A. Gillespie, Ted Reichborn-Kjennerud, (2017). The association between personality disorders with alcohol use and misuse: A population-based twin study. Drug and Alcohol Dependence s. 171-180. doi: 10.1016/j.drugalcdep.2017.01.022
Gro Dehli Villanger, Emily Learner, Matthew P Longnecker, Helga Ask, Heidi Aase, R. Thomas Zoeller, Gun Peggy Knudsen, Ted Reichborn-Kjennerud, Pål Zeiner, Stephanie M Engel, (2017). Effects of Sample Handling and Analytical Procedures on Thyroid Hormone Concentrations in Pregnant Women's Plasma. Epidemiology s. 365-369. doi: 10.1097/EDE.0000000000000606
Ragnar Nesvåg, Erik Gunnar Jönsson, Inger Johanne Bakken, Gun Peggy Knudsen, Thomas Bjella, Ted Reichborn-Kjennerud, Ingrid Melle, Ole Andreas Andreassen, (2017). The quality of severe mental disorder diagnoses in a national health registry as compared to research diagnoses based on structured interview. BMC Psychiatry doi: 10.1186/s12888-017-1256-8
Kristin Gustavson, Eivind Ystrøm, Camilla Stoltenberg, Ezra Susser, Pål Surén, Per Magnus, Gun Peggy Knudsen, George Davey Smith, Kate Langley, Michael Rutter, Heidi Aase, Ted Reichborn-Kjennerud, (2017). Smoking in pregnancy and child ADHD. Pediatrics doi: 10.1542/peds.2016-2509
Susan C South, Robert F Krueger, Gun Peggy Knudsen, Eivind Ystrøm, Nikolai Olavi Czajkowski, Steven H Aggen, Michael C Neale, Nathan A Gillespie, Kenneth S Kendler, Ted Reichborn-Kjennerud, (2017). A Population Based Twin Study of DSM–5 Maladaptive Personality Domains. Personality Disorders: Theory, Research, and Treatment s. 366-375. doi: 10.1037/per0000220
Kenneth S Kendler, Steven H Aggen, Nathan Gillespie, Michael C Neale, Gun Peggy Knudsen, Robert F Krueger, Nikolai Olavi Czajkowski, Eivind Ystrøm, Ted Reichborn-Kjennerud, (2017). The Genetic and Environmental Sources of Resemblance Between Normative Personality and Personality Disorder Traits. Journal of Personality Disorders s. 193-207. doi: 10.1521/pedi_2016_30_251
Ragnar Nesvåg, Ted Reichborn-Kjennerud, Nathan Gillespie, Gun Peggy Knudsen, Jørgen Gustav Bramness, Kenneth S Kendler, Eivind Ystrøm, (2017). Genetic and Environmental Contributions to the Association Between Cannabis Use and Psychotic-Like Experiences in Young Adult Twins. Schizophrenia Bulletin s. 644-653. doi: 10.1093/schbul/sbw101
Kristina Gervin, Christian Page, Hans Christian Aass, Michelle A Jansen, Heidi Fjeldstad, Bettina Kulle Andreassen, Liesbeth Duijts, Joyce B van Meurs, Menno C van Zelm, Vincent W Jaddoe, Hedvig Marie Egeland Nordeng, Gun Peggy Knudsen, Per Magnus, Wenche Nystad, Anne Cathrine Staff, Janine F Felix, Robert Lyle, (2016). Cell type specific DNA methylation in cord blood: a 450K-reference data set and cell count-based validation of estimated cell type composition. Epigenetics s. 690-698. doi: 10.1080/15592294.2016.1214782
Fartein Ask Torvik, Ted Reichborn-Kjennerud, Line C. Gjerde, Gun Peggy Knudsen, Eivind Ystrøm, Kristian Tambs, Espen Røysamb, Kristian Amundsen Østby, Ragnhild Ørstavik, (2016). Mood, anxiety, and alcohol use disorders and later cause-specific sick leave in young adult employees. BMC Public Health doi: 10.1186/s12889-016-3427-9
Kristian Amundsen Østby, Nikolai Olavi Czajkowski, Gun Peggy Knudsen, Eivind Ystrøm, Line C. Gjerde, Kenneth S. Kendler, Ragnhild Ørstavik, Ted Reichborn-Kjennerud, (2016). Does low alcohol use increase the risk of sickness absence? A discordant twin study. BMC Public Health doi: 10.1186/s12889-016-3502-2
Christina Sheerin, Erin C Berenz, Gun Peggy Knudsen, Ted Reichborn-Kjennerud, Kenneth S Kendler, Steven H Aggen, Ananda B Amstadter, (2016). A Population-Based Study of Help Seeking and Self-Medication Among Trauma-Exposed Individuals. Psychology of Addictive Behaviors s. 771-777. doi: 10.1037/adb0000185
Jeanette Aarem, Gunnar Brunborg, Kaja Marianne Klykken Aas, Kari Harbak, Miia Marika Taipale, Per Magnus, Gun Peggy Knudsen, Nur Duale, (2016). Comparison of blood RNA isolation methods from samples stabilized in Tempus tubes and stored at a large human biobank. BMC Research Notes doi: 10.1186/s13104-016-2224-y
Thomas Sevenius Nilsen, Ingunn Brandt, Nikolai Olavi Czajkowski, Gun Peggy Knudsen, Per Magnus, Ted Reichborn-Kjennerud, Kristian Tambs, Jennifer Harris, Ragnhild Ørstavik, (2016). The Norwegian twin registry. Norsk Epidemiologi s. 19-27. doi: 10.5324/nje.v26i1-2.2012
Ragnhild Ørstavik, Gun Peggy Knudsen, Kristian Tambs, Line C. Gjerde, Fartein Ask Torvik, Christopher Sivert Nielsen, Espen Røysamb, Ted Reichborn-Kjennerud, (2016). Musculoskeletal pain and work absence – a 10 year follow-up study of Norwegian young adult twins. Norsk Epidemiologi s. 69-75. doi: 10.5324/nje.v26i1-2.2018
Line C. Gjerde, Fartein Ask Torvik, Kristian Amundsen Østby, Gun Peggy Knudsen, Nikolai Olavi Czajkowski, Ted Reichborn-Kjennerud, Ragnhild Ørstavik, (2016). Advantages of linking national registries with twin registries for epidemiological research. Norsk Epidemiologi s. 83-92. doi: 10.5324/nje.v26i1-2.2020
Per Magnus, Charlotte Birke, Kristine Vejrup, Anita Haugan, Elin Hilde Roti Alsaker, Anne Kjersti Daltveit, Marte Handal, Alice Margaretha Haugen, Gudrun Høiseth, Gun Peggy Knudsen, Liv Paltiel, Patrica Schreuder, Kristian Tambs, Line Vold, Camilla Stoltenberg, (2016). Cohort Profile Update: The Norwegian Mother and Child Cohort Study (MoBa). International Journal of Epidemiology s. 382-388. doi: 10.1093/ije/dyw029
Audun Svendsen Vatn, Eivind Ystrøm, Kristian Tambs, MC Neale, KS Kendler, Ted Reichborn-Kjennerud, Gun Peggy Knudsen, (2016). The relationship between anxiety disorders and dimensional representations of DSM-IV personality disorders: A co-twin control study. Journal of Affective Disorders s. 349-356. doi: 10.1016/j.jad.2015.09.038
Fartein Ask Torvik, Audun Svendsen Vatn, Eivind Ystrøm, Gun Peggy Knudsen, Nikolai Olavi Czajkowski, Kenneth S. Kendler, Ted Reichborn-Kjennerud, (2016). Longitudinal Associations Between Social Anxiety Disorder and Avoidant Personality Disorder: A Twin Study. Journal of Abnormal Psychology s. 114-124. doi: 10.1037/abn0000124
Ted Reichborn-Kjennerud, Nikolai Olavi Czajkowski, Eivind Ystrøm, Ragnhild Ørstavik, Steven H. Aggen, Kristian Tambs, Svenn Torgersen, Michael C. Neale, Espen Røysamb, Robert F. Krueger, Gun Peggy Knudsen, Kenneth S. Kendler, (2015). A longitudinal twin study of borderline and antisocial personality disorder traits in early to middle adulthood. Psychological Medicine s. 3121-3131. doi: 10.1017/S0033291715001117
Line C. Gjerde, Nikolai Olavi Czajkowski, Espen Røysamb, Eivind Ystrøm, Kristian Tambs, Steven H. Aggen, Ragnhild Ørstavik, Kenneth S. Kendler, Ted Reichborn-Kjennerud, Gun Peggy Knudsen, (2015). A longitudinal, population-based twin study of avoidant and obsessive-compulsive personality disorder traits from early to middle adulthood. Psychological Medicine s. 3539-3548. doi: 10.1017/S0033291715001440
Jonas F. Ludvigsson, Siri Eldevik Håberg, Gun Peggy Knudsen, Pierre Lafolie, Helga Zoega, Catharina Sarkkola, Stephanie von Kraemer, Elisabete Weiderpass, Mette Nørgaard, (2015). Ethical aspects of registry-based research in the Nordic countries. Clinical Epidemiology s. 491-508. doi: 10.2147/CLEP.S90589
Bjørn Heine Strand, Tor Atle Rosness, Knut Engedal, Per Magnus, Astrid Liv Mina Bergem, Henrik Schirmer, Espen Bjertness, Gun Peggy Knudsen, (2015). Interaction of apolipoprotein E genotypes, lifestyle factors and future risk of dementia-related mortality: The Cohort of Norway (CONOR). Dementia and Geriatric Cognitive Disorders s. 137-147. doi: 10.1159/000431218
Ragnar Nesvåg, Gun Peggy Knudsen, Inger Johanne Bakken, Anne Høye, Eivind Ystrøm, Pål Surén, Anne Reneflot, Camilla Stoltenberg, Ted Reichborn-Kjennerud, (2015). Substance use disorders in schizophrenia, bipolar disorder, and depressive illness: a registry-based study. Social Psychiatry and Psychiatric Epidemiology s. 1267-1276. doi: 10.1007/s00127-015-1025-2
Ted Reichborn-Kjennerud, Gun Peggy Knudsen, (2015). Obsessive-compulsive personality disorder. s. 707-728.
Virginia T. Guidry, Matthew P. Longnecker, Heidi Aase, Merete Åse Eggesbø, Pål Zeiner, Ted Reichborn-Kjennerud, Gun Peggy Knudsen, Randi Jacobsen Bertelsen, Xiaoyun Ye, Antonia M. Calafat, Stephanie M Engel, (2015). Measurement of total and free urinary phenol and paraben concentrations over the course of pregnancy: assessing reliability and contamination of specimens in the Norwegian Mother and Child Cohort Study. Environmental Health Perspectives s. 705-711. doi: 10.1289/ehp.1408325
Fartein Ask Torvik, Eivind Ystrøm, Nikolai Olavi Czajkowski, Kristian Tambs, Espen Røysamb, Ragnhild Ørstavik, Gun Peggy Knudsen, Kenneth S Kendler, Ted Reichborn-Kjennerud, (2015). Socioeconomic status and sick leave granted for mental and somatic disorders: a prospective study of young adult twins. BMC Public Health doi: 10.1186/s12889-015-1457-3
Tetyana Zayats, Lavinia Athanasiu, Ida Elken Sønderby, Srdjan Djurovic, Lars Tjelta Westlye, Christian Krog Tamnes, Tormod Fladby, Heidi Aase, Pål Zeiner, Ted Reichborn-Kjennerud, Per Knappskog, Gun Peggy Knudsen, Ole Andreas Andreassen, Stefan Johansson, Jan Haavik, (2015). Genome-wide analysis of attention deficit hyperactivity disorder in Norway. PLOS ONE doi: 10.1371/journal.pone.0122501
Stacy Steinberg, Hreinn Stefansson, Thorlakur Jonsson, Hrefna Johannsdottir, Andrés Ingason, Hannes Helgason, Patrick Sulem, Olafur Thor Magnusson, Sigurjón Axel Guðjónsson, Unnur Unnsteinsdottir, Chung Tung Augustine Kong, Seppo Helisalmi, Hilkka Soininen, James J. Lah, Dag Aarsland, Tormod Fladby, Ingun Ulstein, Srdjan Djurovic, Sigrid Botne Sando, Linda White, Gun Peggy Knudsen, Lars Tjelta Westlye, Geir Selbæk, Ina Giegling, Harald Hampel, Mikko Hiltunen, AIlan I. Levey, Ole Andreas Andreassen, Dan Rujescu, Palmi V. Jonsson, Sigurbjörn Björnsson, Jon Snædal, Kári Stefánsson, (2015). Loss-of-function variants in ABCA7 confer risk of Alzheimer’s disease. Nature Genetics s. 445-447. doi: 10.1038/ng.3246
Kenneth S. Kendler, SH Aggen, MC Neale, Gun Peggy Knudsen, Robert F Krueger, Kristian Tambs, Nikolai Olavi Czajkowski, Eivind Ystrøm, Ragnhild Ørstavik, Ted Reichborn-Kjennerud, (2015). A longitudinal twin study of cluster A personality disorders. Psychological Medicine s. 1531-1538. doi: 10.1017/S0033291714002669
Ruth C. Brown, Erin C. Berenz, Steven H. Aggen, Charles O. Gardner, Gun Peggy Knudsen, Ted Reichborn-Kjennerud, Kenneth S. Kendler, Ananda B. Amstadter, (2014). Trauma exposure and Axis I psychopathology: A cotwin control analysis in Norwegian young adults. Psychological Trauma s. 652-660. doi: 10.1037/a0034326
Ted Reichborn-Kjennerud, Gun Peggy Knudsen, Ole Andreas Andreassen, Thomas Espeseth, Astri Lundervold, Ivar Reinvang, Vidar Martin Steen, Stephanie Le Hellard, Morten Mattingsdal, V Boraske, CS Franklin, James A. B. Floyd, Laura M Thornton, L. M. Huckins, L Southam, NW Rayner, I Tachmazidou, KL Klump, Jim Treasure, C. M. Lewis, U Schmidt, F Tozzi, K Kiezebrink, J. Hebebrand, P. Gorwood, R. A. H. Adan, M. J. H. Kas, A Favaro, P Santonastaso, Fernando Fernández-Aranda, Mònica Gratacòs, Finn Rybakowski, M. Dmitrzak-Weglarz, J Kaprio, A Keski-Rahkonen, A. Raevuori, E. F. Van Furth, M. C. T. Slof-Op 't Landt, JI Hudson, P. Monteleone, AS Kaplan, A Karwautz, H Hakonarson, W. H. Berrettini, Y Guo, D Li, NJ Schork, G Komaki, T Ando, H. Inoko, (2014). A genome-wide association study of anorexia nervosa. Molecular Psychiatry s. 1085-1094. doi: 10.1038/mp.2013.187
Liv Paltiel, Trine Waagsbø Skjerden, Kari Harbak, Siri Margrethe Bækken, Nina Kristin Stensrud, Gun Peggy Knudsen, Per Magnus, (2014). The biobank of the Norwegian Mother and Child Study - present status. Norsk Epidemiologi s. 29-35. doi: 10.5324/nje.v24i1-2.1755
Ragnhild Ørstavik, Nikolai Olavi Czajkowski, Espen Røysamb, Gun Peggy Knudsen, Kristian Tambs, Ted Reichborn-Kjennerud, (2014). Sex differences in genetic and environmental influences on educational attainment and income. Twin Research and Human Genetics s. 516-525. doi: 10.1017/thg.2014.68
Randi Jacobsen Bertelsen, Stephanie M. Engel, Todd A. Jusko, Antonia M. Calafat, Jane A Hoppin, Stephanie J. London, Merete Åse Eggesbø, Heidi Aase, Pål Zeiner, Ted Reichborn-Kjennerud, Gun Peggy Knudsen, Virginia T Guidry, Matthew P Longnecker, (2014). Reliability of triclosan measures in repeated urine samples from Norwegian pregnant women. Journal of Exposure Science and Environmental Epidemiology s. 517-521. doi: 10.1038/jes.2013.95
Kristian Amundsen Østby, Nikolai Czajkowski, Gun Peggy Knudsen, Eivind Ystrøm, Line C. Gjerde, Kenneth S. Kendler, Ragnhild Ørstavik, Ted Reichborn-Kjennerud, (2014). Personality disorders are important risk factors for disability pensioning. Social Psychiatry and Psychiatric Epidemiology s. 2003-2011. doi: 10.1007/s00127-014-0878-0
Fartein Ask Torvik, Line Cecilie Gjerde, Espen Røysamb, Kristian Tambs, Kenneth S. Kendler, Nikolai Olavi Czajkowski, Gun Peggy Knudsen, Ted Reichborn-Kjennerud, Ragnhild Ørstavik, (2014). Genetic and environmental contributions to the relationship between internalizing disorders and sick leave granted for mental and somatic disorders. Twin Research and Human Genetics s. 225-235. doi: 10.1017/thg.2014.27
Inger Johanne Bakken, Eline Revdal, Ragnar Nesvåg, Eiliv Brenner, Gun Peggy Knudsen, Pål Suren, Sara Ghaderi, Nina Gunnes, Per Magnus, Ted Reichborn-Kjennerud, Camilla Stoltenberg, Lill Trogstad, Siri Eldevik Håberg, Eylert Brodtkorb, (2014). Substance use disorders and psychotic disorders in epilepsy: a population-based registry study. Epilepsy Research s. 1435-1443. doi: 10.1016/j.eplepsyres.2014.06.021
Mona Dverdal Jansen, Gun Peggy Knudsen, Ronny Myhre, Gudrun Høiseth, Jørg Mørland, Øyvind Næss, Kristian Tambs, Per Magnus, (2014). Genetic variants in loci 1p13 and 9p21 and fatal coronary heart disease in a Norwegian case-cohort study. Molecular Biology Reports s. 2733-2743. doi: 10.1007/s11033-014-3096-7
Line Cecilie Gjerde, Espen Røysamb, Nikolai Olavi Czajkowski, Gun Peggy Knudsen, Kristian Amundsen Østby, Kristian Tambs, Kenneth S Kendler, Ted Reichborn-Kjennerud, Ragnhild Ørstavik, (2014). Personality disorders and long-term sick leave: A population-based study of young adult norwegian twins. Twin Research and Human Genetics s. 1-9. doi: 10.1017/thg.2013.90
Thomas Sevenius Nilsen, Gun Peggy Knudsen, Kristina Gervin, Ingunn Brandt, Espen Røysamb, Kristian Tambs, Ragnhild Ørstavik, Robert Lyle, Ted Reichborn-Kjennerud, Per Magnus, Jennifer Harris, (2013). The Norwegian twin registry from a public health perspective: a research update. Twin Research and Human Genetics s. 285-295. doi: 10.1017/thg.2012.117
Sidsel Graff-Iversen, Mona Dverdal Jansen, Dominic Anthony Hoff, Gudrun Høiseth, Gun Peggy Knudsen, Per Magnus, Jørg Mørland, Per Trygve Normann, Øyvind Næss, Kristian Tambs, (2013). Divergent associations of drinking frequency and binge consumption of alcohol with mortality within the same cohort. Journal of Epidemiology and Community Health s. 350-357. doi: 10.1136/jech-2012-201564
Bjørn Heine Strand, Ellen Melbye Langballe, Vidar Hjellvik, Marte Handal, Øyvind Næss, Gun Peggy Knudsen, Helga Refsum, Kristian Tambs, Per Nafstad, Henrik Schirmer, Astrid Liv Mina Bergem, Randi Selmer, Knut Arne Engedal, Per Magnus, Espen Bjertness, (2013). Midlife vascular risk factors and their association with dementia deaths: Results from a Norwegian prospective study followed up for 35 years. Journal of Neurological Sciences s. 124-130. doi: 10.1016/j.jns.2012.10.018
Ananda B Amstadter, Steven H Aggen, Gun Peggy Knudsen, Ted Reichborn-Kjennerud, Kenneth S Kendler, (2013). Potentially traumatic event exposure, posttraumatic stress disorder, and Axis I and II comorbidity in a poulation-based study of Norwegian young adults. Social Psychiatry and Psychiatric Epidemiology s. 215-223. doi: 10.1007/s00127-012-0537-2
Erin C. Berenz, Ananda B. Amstadter, Steven H. Aggen, Gun Peggy Knudsen, Ted Reichborn-Kjennerud, Charles O. Gardner, Kenneth S. Kendler, (2013). Childhood trauma and personality disorder criterion counts: a co-twin control analysis. Journal of Abnormal Psychology s. 1070-1076. doi: 10.1037/a0034238
Ted Reichborn-Kjennerud, Eivind Ystrøm, Michael C Neale, Steven H Aggen, Suzanne E Mazzeo, Gun Peggy Knudsen, Kristian Tambs, Nikolai Olavi Czajkowski, Kenneth S Kendler, (2013). Structure of genetic and environmental risk factors for symptoms of DSM-IV borderline personality disorder. JAMA psychiatry s. 1206-1214. doi: 10.1001/jamapsychiatry.2013.1944
Line Cecilie Gjerde, Gun Peggy Knudsen, Nikolai Olavi Czajkowski, Nathan Gillespie, Steven H Aggen, Espen Røysamb, Ted Reichborn-Kjennerud, Kristian Tambs, Kenneth S Kendler, Ragnhild Ørstavik, (2013). Genetic and Environmental Contributions to Long-Term Sick Leave and Disability Pension: A Population-Based Study of Young Adult Norwegian Twins. Twin Research and Human Genetics s. 759-766. doi: 10.1017/thg.2013.36
Gudrun Høiseth, Per Magnus, Gun Peggy Knudsen, Mona Dverdal Jansen, Øyvind Næss, Kristian Tambs, Jørg Mørland, (2013). Is ADH1C genotype relevant for the cardioprotective effect of alcohol?. Alcohol s. 81-84. doi: 10.1016/j.alcohol.2012.12.005
Ananda B. Amstadter, Steven H. Aggen, Gun Peggy Knudsen, Ted Reichborn-Kjennerud, Kenneth S. Kendler, (2012). A population-based study of familial and individual-specific environmental contributions to traumatic event exposure and posttraumatic stress disorder symptoms in a Norwegian twin sample. Twin Research and Human Genetics s. 656-662. doi: 10.1017/thg.2012.43
Christopher Sivert Nielsen, Gun Peggy Knudsen, Ólöf Anna Steingrímsdóttir, (2012). Twin studies of pain. Clinical Genetics s. 331-340. doi: 10.1111/j.1399-0004.2012.01938.x
Line Cecilie Gjerde, Nikolai Olavi Czajkowski, Espen Røysamb, Ragnhild Ørstavik, Gun Peggy Knudsen, Kristian Roald Amundsen Østby, Svenn Torgersen, J Myers, KS Kendler, Ted Reichborn-Kjennerud, (2012). The heritability of avoidant and dependent personality disorder assessed by personal interview and questionnaire. Acta Psychiatrica Scandinavica s. 448-457. doi: 10.1111/j.1600-0447.2012.01862.x

Gun Peggy Strømstad Knudsen,
Line Cecilie Gjerde, Ragnhild Ørstavik, Espen Røysamb, Gun Peggy Knudsen, (2014). Genetic and environmental contributions to personality disorders, long-term sick leave and disability pension

Giske Ursin, Nea Malila, Jenny Chang-Claude, Marc Gunter, Rudolf Kaaks, Ellen Kampman, Mats Lambe, Flora van Leeuwen, Patrik K. Magnusson, M Nilbert, Pål Richard Romundstad, Martin Röösli, Anne Lise Ryel, Isabel Dos-Santos-Silva, Magnus Stenbeck, Hans Storm, Anthony Swerdlow, Paolo Vineis, Gun Peggy Strømstad Knudsen, (2019). Sharing data safely while preserving privacy. The Lancet doi: 10.1016/S0140-6736(19)32603-0
Giske Ursin, Magnus Stenbeck, Jenny Chang-Claude, Marc Gunter, Rudolf Kaaks, Ellen Kampman, Mats Lambe, Flora van Leeuwen, Patrik K. Magnusson, Nea Malila, M Nilbert, Pål Richard Romundstad, Martin Röösli, Anne Lise Ryel, Isabel Dos-Santos-Silva, Hans Storm, Anthony Swerdlow, Paolo Vineis, Gun Peggy Strømstad Knudsen, (2019). Data must be shared—also with researchers outside of Europe. The Lancet s. 1902-1903. doi: 10.1016/S0140-6736(19)32633-9
Laura Marianne Huckins, Konstantinos Hatzikotoulas, Lorraine Southam, Laura M. Thornton, Julia Steinberg, Fernando Riveros McKay Aguilera, Janet Treasure, Ulrike Schmidt, Cerisse Gunasinghe, Alvin Romero, Charles Curtis, Daniela Rhodes, J. Moens, Gursharan Kalsi, David Dempster, Rufina Leung, Aofie Keohane, Roland Burghardt, Stefan Ehrlich, Johannes Hebebrand, Anke Hinney, Albert Ludolph, Esther Walton, Panagiotis Deloukas, Albert Hofman, Aarno Palotie, Priit Palta, Frank J. A. van Rooij, Kathleen Stirrups, Roger A. H. Adan, C. Boni, Roger Cone, George Dedoussis, Eric F. van Furth, Fragiskos Gonidakis, Philip Gorwood, James I. Hudson, Jaakko Kaprio, Martien J. Kas, Anna Keski-Rahonen, Kirsty Kiezebrink, Gun Peggy S. Knudsen, Mario Maj, Alessio Maria Monteleone, Palmiero Monteleone, Anu Raevuori, Ted Reichborn-Kjennerud, Federica Tozzi, Artemis Tsitsika, Annemarie A. van Elburg, Darnesha Collier, Patrick F. Sullivan, Gerome Breen, Cynthia M. Bulik, Eleftheria Zeggini, (2018). Correction to: Investigation of common, low-frequency and rare genome-wide variation in anorexia nervosa (Molecular Psychiatry, (2018), 23, 5, (1169-1180), 10.1038/mp.2017.88). Molecular Psychiatry doi: 10.1038/mp.2017.202
Eivind Ystrøm, Kristin Gustavson, Ragnhild Eek Brandlistuen, Gun Peggy Knudsen, Per Magnus, Ezra Susser, George Davey Smith, Camilla Stoltenberg, Pål Surén, Siri Eldevik Håberg, Mady Hornig, W. Ian Lipkin, Hedvig Marie Egeland Nordeng, Ted Reichborn-Kjennerud, (2017). Acetaminophen exposure in pregnancy and offspring ADHD: familial risk and confounding by indication.
Nikolai Olavi Czajkowski, Steven H. Aggen, Gun Peggy Knudsen, Robert F Krueger, Michael C. Neale, Eivind Ystrøm, Ragnar Nesvåg, Kenneth S. Kendler, Ted Reichborn-Kjennerud, (2015). Modest overlap in the genetic influences underlying normal and abnormal personality.
Fartein Ask Torvik, Audun Welander-Vatn, Eivind Ystrøm, Gun Peggy Knudsen, Nikolai Olavi Czajkowski, Kenneth S. Kendler, Ted Reichborn-Kjennerud, (2015). Ten-year stability of avoidant personality disorder and social anxiety disorder: A twin study.
Line C. Gjerde, Nikolai Olavi Czajkowski, Espen Røysamb, Eivind Ystrøm, Kristian Tambs, Steven H. Aggen, Ragnhild Ørstavik, Kenneth S. Kendler, Ted Reichborn-Kjennerud, Gun Peggy Knudsen, (2015). Avoidant and obsessive-compulsive personality disorder traits from early to middle adulthood.
Ted Reichborn-Kjennerud, Nikolai Olavi Czajkowski, Eivind Ystrøm, Ragnhild Ørstavik, Steven H. Aggen, Kristian Tambs, Svenn Torgersen, Michael C. Neale, Espen Røysamb, Robert F Krueger, Gun Peggy Knudsen, Kenneth S. Kendler, (2015). Borderline and antisocial personality disorder traits in early to middle adulthood: A longitudinal twin study.
Line C. Gjerde, Nikolai Olavi Czajkowski, Espen Røysamb, Eivind Ystrøm, Kristian Tambs, Steven H. Aggen, Ragnhild Ørstavik, Kenneth S. Kendler, Ted Reichborn-Kjennerud, Gun Peggy Knudsen, (2015). Avoidant and obsessive-compulsive personality disorder traits from early to middle adulthood.
Eivind Ystrøm, Kenneth S. Kendler, Gun Peggy Knudsen, Ted Reichborn-Kjennerud, (2013). Common genetic and environmental risk factors for DSM-IV personality disorders and alcohol use disorders.
Line C. Gjerde, Espen Røysamb, Nikolai Olavi Czajkowski, Gun Peggy Knudsen, Kristian Amundsen Østby, Kristian Tambs, Kenneth S. Kendler, Ted Reichborn-Kjennerud, Ragnhild Ørstavik, (2013). Personality disorders and long-term sick leave - Preliminary results from a population-based study of young adult Norwegian twins.
Kristian Amundsen Østby, Line C. Gjerde, Gun Peggy Knudsen, Eivind Ystrøm, (2013). Personality disorders in young adult twins: functional impairment and comorbidity.
Audun Welander-Vatn, Eivind Ystrøm, Kristian Tambs, Kenneth Kendler, Ted Reichborn-Kjennerud, Gun Peggy Knudsen, (2013). A population-based twin study of the relationship between anxiety disorders and dimensional representations of personality disorders. Behavior Genetics s. 548-548.
Fartein Ask Torvik, Line Cecilie Gjerde, Gun Peggy Knudsen, Ted Reichborn-Kjennerud, ESPEN ROYSAMB, Nikolai Olavi Czajkowski, Kristian Tambs, Ragnhild Ørstavik, (2013). Anxiety, depression and sick leave due to various diagnoses: A population-based study of young adult Norwegian twins. Behavior Genetics s. 544-544.
Gun Peggy Knudsen, Kristian Tambs, Jack Hettema, Ragnhild Ørstavik, Espen Røysamb, Nikolai Czajkowski, Kenneth S. Kendler, Ted Reichborn-Kjennerud, (2012). The influence of personality disorders on longitudinal stability of anxiety. Behavior Genetics s. 944-944. doi: 10.1007/s10519-012-9566-6

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