About the Authors

Markus Perola

Affiliations Department of Molecular Medicine, National Public Health Institute, Helsinki, Finland , Faculty of Medicine, Department of Medical Genetics, University of Helsinki, Helsinki, Finland

Sampo Sammalisto

Affiliation Department of Molecular Medicine, National Public Health Institute, Helsinki, Finland

Tero Hiekkalinna

Affiliation Department of Molecular Medicine, National Public Health Institute, Helsinki, Finland

Nick G Martin

Affiliation Queensland Institute of Medical Research, Brisbane, Australia

Peter M Visscher

Affiliation Queensland Institute of Medical Research, Brisbane, Australia

Grant W Montgomery

Affiliation Queensland Institute of Medical Research, Brisbane, Australia

Beben Benyamin

Affiliation Queensland Institute of Medical Research, Brisbane, Australia

Jennifer R Harris

Affiliation Norwegian Institute of Public Health, Oslo, Norway

Dorret Boomsma

Affiliation Free University, Amsterdam, The Netherlands

Gonneke Willemsen

Affiliation Free University, Amsterdam, The Netherlands

Jouke-Jan Hottenga

Affiliation Free University, Amsterdam, The Netherlands

Kaare Christensen

Affiliation Department of Epidemiology, Institute of Public Health, University of Southern Denmark, Odense, Denmark

Kirsten Ohm Kyvik

Affiliation Department of Epidemiology, Institute of Public Health, University of Southern Denmark, Odense, Denmark

Thorkild I. A Sørensen

Affiliation The Institute of Preventive Medicine, Copenhagen, Denmark

Nancy L Pedersen

Affiliation Karolinska Institutet, Stockholm, Sweden

Patrik K. E Magnusson

Affiliation Karolinska Institutet, Stockholm, Sweden

Tim D Spector

Affiliation Kings College London, London, United Kingdom

Elisabeth Widen

Affiliation Finnish Genome Center, University of Helsinki, Helsinki, Finland

Karri Silventoinen

Affiliation Faculty of Medicine, Department of Public Health, University of Helsinki, Helsinki, Finland

Jaakko Kaprio

Affiliations Faculty of Medicine, Department of Public Health, University of Helsinki, Helsinki, Finland , Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland

Aarno Palotie

Affiliation Finnish Genome Center, University of Helsinki, Helsinki, Finland

Leena Peltonen

To whom correspondence should be addressed. E-mail: leena.peltonen@ktl.fi

Affiliations Department of Molecular Medicine, National Public Health Institute, Helsinki, Finland , Faculty of Medicine, Department of Medical Genetics, University of Helsinki, Helsinki, Finland , The Broad Institute, Massachusetts Institute of Technology, Boston, Massachusetts, United States of America

GenomEUtwin Project

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

MP, NGM, PMV, BB, JHR, DB, GW, JJH, KC, KOK, NLP, TDS, EW, JK, AP, and LP conceived and designed the experiments. MP, EW, and AP performed the experiments. MP, SS, TH, and PKEM analyzed the data. MP, SS, TH, NGM, PMV, BB, DB, GW, JJH, KC, KOK, TIAS, NLP, TDS, JK, AP, and LP contributed reagents/materials/analysis tools. All authors wrote the paper.