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Oleksandr Frei

Oslo University Hospital and University of Oslo

45H-index
303Paper Count
1.3WCitation Count
Published Papers 138
Publication Date
Family genetic designs in MoBa provide insights into health and functioning
errNature
IF48.5
err2026-08-19
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errOAAI
errElizabeth C. Corfield; Alexey A. Shadrin; Oleksandr Frei; Zillur Rahman; Bayram Cevdet Akdeniz; Tahir Tekin Filiz; Aihua Lin; Isabella Badini; Laura Hegemann; Lavinia Athanasiu; Robyn E. Wootton; Chloe Austerberry; Amanda M. Hughes; Martin Tesli; Espen Hagen; Ragnhild E. Brandlistuen; Espen Moen Eilertsen; Lars T. Westlye; Pål R. Njølstad; Per Magnus; Eivind Hovig; Tetyana Zayats; Helga Ask; Ted Reichborn-Kjennerud; Gibran Hemani; Neil M. Davies; Laurie J. Hannigan; Ole A. Andreassen; Alexandra Karoline Havdahl
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Mapping genetic convergence across brain structure, mental health, and cardiometabolic disease
err2026-07-27
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errOAAI
errJakub Kopal; Alexey A. Shadrin; Dennis van der Meer; Olav B. Smeland; Sara E. Stinson; Linn Rødevand; Nadine Parker; Kevin S. O’Connell; Oleksandr Frei; Srdjan Djurovic; Anders M. Dale; Ole A. Andreassen
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Comorbidity alters the genetic relationship between anxiety disorders and major depression
err2026-05-08
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errOAAI
errMarkos Tesfaye; Alexey Shadrin; Nadine Parker; Piotr Jaholkowski; Pravesh Parekh; Gleda Kutrolli; Viktoria Birkenæs; Nora R. Bakken; Helga Ask; Guy Hindley; Oleksandr Frei; Srdjan Djurovic; Anders M. Dale; Olav B. Smeland; Kevin S. O’Connell; Ole A. Andreassen
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Genetic overlap and shared risk loci between autism spectrum disorder and cardiometabolic traits
err2026-04-20
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errOAAI
errGerard Muntané; Alexey Shadrin; M. Guardiola-Ripoll; Kevin S. O’Connell; Oleksandr Frei; Terje Naerland; Elisabet Vilella; Ole A. Andreassen
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Leveraging the genetics of psychiatric disorders to prioritize potential drug targets and compounds
err2026-03-07
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PREAI
errNadine Parker; Elise Koch; Alexey A. Shadrin; Julian Fuhrer; Guy F. L. Hindley; Sara E. Stinson; Piotr Jaholkowski; Markos Tesfaye; Anders M. Dale; Thomas S. Wingo; Aliza P. Wingo; Oleksandr Frei; Kevin S. O’Connell; Olav B. Smeland; Ole A. Andreassen
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Shared genetic architecture between autism spectrum disorder, loneliness, and social isolation reveals novel genetic loci
err2026-03-01
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PREAI
errHope, Sigrun; Lin, Aihua; Rodevand, Linn; Hubenette, Saira Jameela; Quintana, Daniel S.; Sonderby, Ida E.; Cheng, Weiqiu; Frei, Oleksandr; Bahrami, Shahram; Hindley, Guy F. L.; Kaale, Anett; Shadrin, Alexey A.; O'Connell, Kevin S.; Parker, Nadine; Djurovic, Srdjan; Naerland, Terje; Andreassen, Ole A.
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The genetic architecture of human cerebellar morphology supports a key role for the cerebellum in human evolution and psychopathology
err2026-02-17
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errOAAI
errTorgeir Moberget; Dennis van der Meer; Shahram Bahrami; Daniel Roelfs; Oleksandr Frei; Tobias Kaufmann; Sara Fernandez-Cabello; Milin Kim; Thomas Wolfers; Joern Diedrichsen; Olav B. Smeland; Alexey Shadrin; Anders Dale; Ole A. Andreassen; Lars T. Westlye
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Mapping the genetic landscape across 14 psychiatric disorders
errNature
IF48.5
err2025-12-10
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errOAAI
errAndrew D. Grotzinger; Josefin Werme; Wouter J. Peyrot; Oleksandr Frei; Christiaan de Leeuw; Lucy K. Bicks; Qiuyu Guo; Michael P. Margolis; Brandon J. Coombes; Anthony Batzler; Vanessa Pazdernik; Joanna M. Biernacka; Ole A. Andreassen; Verneri Anttila; Anders D. Børglum; Gerome Breen; Na Cai; Ditte Demontis; Howard J. Edenberg; Stephen V. Faraone; Barbara Franke; Michael J. Gandal; Joel Gelernter; Alexander S. Hatoum; John M. Hettema; Emma C. Johnson; Katherine G. Jonas; James A. Knowles; Karestan C. Koenen; Adam X. Maihofer; Travis T. Mallard; Manuel Mattheisen; Karen S. Mitchell; Benjamin M. Neale; Caroline M. Nievergelt; John I. Nurnberger; Kevin S. O’Connell; Roseann E. Peterson; Elise B. Robinson; Sandra S. Sanchez-Roige; Susan L. Santangelo; Jeremiah M. Scharf; Hreinn Stefansson; Kari Stefansson; Murray B. Stein; Nora I. Strom; Laura M. Thornton; Elliot M. Tucker-Drob; Brad Verhulst; Irwin D. Waldman; G. Bragi Walters; Naomi R. Wray; Dongmei Yu; Phil H. Lee; Kenneth S. Kendler; Jordan W. Smoller
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Genome-wide meta-analyses of non-response to antidepressants provide insights into underlying molecular genetics and suggest potential pharmacotherapies
err2025-11-19
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PREAI
errElise Koch; Tuuli Puusepp; Guðmundur Einarsson; Brittany L. Mitchell; Arvid Harder; Yuhao Lin; Luis M. García-Marín; Kristi Krebs; Alexey A. Shadrin; Ying Xiong; Oleksandr Frei; Yi Lu; Sara Hägg; Miguel E. Rentería; Sarah E. Medland; Naomi R. Wray; Nicholas G. Martin; Christopher Hübel; Gerome Breen; Thorgeir Thorgeirsson; Hreinn Stefánsson; Kári Stefánsson; Kelli Lehto; Lili Milani; Ole A. Andreassen; Kevin S. O’Connell
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Genome-wide association analyses identify distinct genetic architectures for early-onset and late-onset depression
err2025-11-13
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errOAAI
errJohn R. Shorter; Joëlle A. Pasman; Siim Kurvits; Andreas Jangmo; Joonas Naamanka; Arvid Harder; Espen Hagen; Kaarina Kowalec; Nelli Frilander; Richard Zetterberg; Joeri J. Meijsen; Jesper R. Gådin; Jacob Bergstedt; Ying Xiong; Sara Hägg; Mikael Landén; Christian Rück; John Wallert; Alkistis Skalkidou; Elise Koch; Bayram C. Akdeniz; Oleksandr Frei; Iiris Hovatta; Ted Reichborn-Kjennerud; Thomas M. Werge; Patrick F. Sullivan; Ole A. Andreassen; Martin Tesli; Kelli Lehto; Alfonso Buil; Yi Lu
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A genome-wide analysis of the shared genetic risk architecture of complex neurological and psychiatric disorders
err2025-11-11
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PREAI
errOlav B. Smeland; Gleda Kutrolli; Shahram Bahrami; Vera Fominykh; Nadine Parker; Julian Fuhrer; Guy F. L. Hindley; Linn Rødevand; Piotr Jaholkowski; Markos Tesfaye; Pravesh Parekh; Torbjørn Elvsåshagen; Andrew D. Grotzinger; Nils Eiel Steen; Dennis van der Meer; Kevin S. O’Connell; Srdjan Djurovic; Anders M. Dale; Alexey A. Shadrin; Oleksandr Frei; Ole A. Andreassen
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The phenotypic and genetic relationship between adolescent mental health and time spent on social media, gaming, and TV
err2025-10-02
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errOAAI
errEvgeniia Frei; Oleksandr Frei; Piotr Jaholkowski; Nadine Parker; Pravesh Parekh; Alexey A. Shadrin; Espen Hagen; Nora R. Bakken; Viktoria Birkenæs; Helga Ask; Ole A. Andreassen; Olav B. Smeland
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Distinct patterns of genetic overlap among multimorbidities revealed with trivariate MiXeR
err2025-09-30
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errOAAI
errAlexey A. Shadrin; Guy Hindley; Espen Hagen; Nadine Parker; Markos Tesfaye; Piotr Jaholkowski; Zillur Rahman; Gleda Kutrolli; Vera Fominykh; Srdjan Djurovic; Olav B. Smeland; Kevin S. O’Connell; Dennis van der Meer; Oleksandr Frei; Ole A. Andreassen; Anders M. Dale
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Associations of polygenic risk scores for major depression and depression severity: an investigation of 105 623 individuals with 16 years follow-up
err2025-09-17
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errOAAI
errMarit Haram; Andreas Jangmo; Piotr Jaholkowski; Joëlle Pasman; Joeri Meijsen; John R. Shorter; Elizabeth C. Corfield; Oleksandr Frei; Ted Reichborn-Kjennerud; Alfonso Buil; Yi Lu; Thomas Werge; Patrick Sullivan; Ole A. Andreassen; Martin Tesli
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Mapping the genetic landscape of immune-mediated disorders: potential implications for classification and therapeutic strategies
err2025-05-08
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errOAAI
errFominykh, Vera; Shadrin, Alexey A.; Jaholkowski, Piotr; Fuhrer, Julian; Parker, Nadine; Wistroem, Erik D.; Frei, Oleksandr; Smeland, Olav B.; Sanner, Helga; Djurovic, Srdjan; Andreassen, Ole A.
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Mapping the Genetic Landscape of Psychiatric Disorders With the MiXeR Toolset
err2025-02-19
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errOAAI
errDennis van der Meer; Guy Hindley; Alexey A. Shadrin; Olav B. Smeland; Nadine Parker; Anders M. Dale; Oleksandr Frei; Ole A. Andreassen
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Polygenic overlap with granulocyte counts identifies novel loci for clozapine metabolism and clozapine-induced agranulocytosis
err2025-01-18
err0
PREAI
errKoch, Elise; Shadrin, Alexey A.; Parker, Nadine; Lock, Siobhan K.; Smith, Robert L.; Frei, Oleksandr; Dale, Anders M.; Djurovic, Srdjan; Molden, Espen; O'Connell, Kevin S.; Andreassen, Ole A.
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Large-scale brainstem neuroimaging and genetic analyses provide new insights into the neuronal mechanisms of hypertension
err2025-01-01
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errOAAI
errGurholt, Tiril P.; Elvsashagen, Torbjorn; Bahrami, Shahram; Rahman, Zillur; Shadrin, Alexey; Askeland-Gjerde, Daniel E.; van der Meer, Dennis; Frei, Oleksandr; Kaufmann, Tobias; Sonderby, Ida E.; Halvorsen, Sigrun; Westlye, Lars T.; Andreassen, Ole A.
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Charting the shared genetic architecture of Alzheimer's disease, cognition, and educational attainment, and associations with brain development
err2024-12-01
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errOAAI
errJaholkowski, Piotr; Bahrami, Shahram; Fominykh, Vera; Hindley, Guy F. L.; Tesfaye, Markos; Parekh, Pravesh; Parker, Nadine; Filiz, Tahir T.; Nordengen, Kaja; Hagen, Espen; Koch, Elise; Bakken, Nora R.; Frei, Evgeniia; Birkenaes, Viktoria; Rahman, Zillur; Frei, Oleksandr; Haavik, Jan; Djurovic, Srdjan; Dale, Anders M.; Smeland, Olav B.; O'Connell, Kevin S.; Shadrin, Alexey A.; Andreassen, Ole A.
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Hemochromatosis neural archetype reveals iron disruption in motor circuits
err2024-11-22
err0
PREAI
errLoughnan, Robert; Ahern, Jonathan; Boyle, Mary; Jernigan, Terry L.; Hagler, Donald J.; Iversen, John R.; Frei, Oleksandr; Smith, Diana M.; Andreassen, Ole; Zaitlen, Noah; Sugrue, Leo; Thompson, Wesley K.; Dale, Anders; Schork, Andrew J.; Fan, Chun Chieh
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