About the Authors

Anu Raevuori

anu.raevuori@helsinki.fi

Affiliations Hjelt Institute, Department of Public Health, University of Helsinki, Helsinki, Finland, Department of Adolescent Psychiatry, Helsinki University Central Hospital, Helsinki, Finland, Institute of Clinical Medicine, Child Psychiatry, University of Turku, Turku, Finland, Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Helsinki, Finland

Jari Haukka

Affiliations Hjelt Institute, Department of Public Health, University of Helsinki, Helsinki, Finland, Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Helsinki, Finland

Outi Vaarala

Affiliation Department of Vaccination and Immune Protection, National Institute for Health and Welfare, Helsinki, Finland

Jaana M. Suvisaari

Affiliations Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Helsinki, Finland, Department of Social Psychiatry, Tampere School of Public Health, Tampere, Finland

Mika Gissler

Affiliations Information Department, National Institute for Health and Welfare, Helsinki, Finland, Nordic School of Public Health, Gothenburg, Sweden

Marjut Grainger

Affiliation Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Helsinki, Finland

Milla S. Linna

Affiliation Hjelt Institute, Department of Public Health, University of Helsinki, Helsinki, Finland

Jaana T. Suokas

Affiliations Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Helsinki, Finland, Department of Psychiatry, Helsinki University Central Hospital, Helsinki, Finland

Competing Interests

Drs. Raevuori, Vaarala, Gissler, and Linna and Mrs. Grainger have declared that no competing interests exist. Dr. Haukka has served as Chief Scientific Officer in Epid Research Ltd (Finland) that provides research services for pharmaceutical industry and academic research groups. He has equity ownership of Epid Research Ltd, and has had research agreements with Janssen Cilag, Novartis, Orion Pharma, Abbott, Novo Nordisk Farma, Pfizer, Sanofi-Aventis, Astellas, and Takeda, but no conflict of interest is reported with respect of this study. Dr. Suvisaari has served as a consultant for Janssen Cilag in a study that is not related to this manuscript and has received a lecturing fee from AstraZeneca. Dr. Suokas has been involved in research collaboration with Janssen Cilag and has received fees for giving expert opinions to Lightlake Sinclair and attended an international conference supported by Janssen Cilag. The authors would like to confirm the following. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: AR JH OV J. Suvisaari M. Gissler M. Grainger ML J. Suokas. Analyzed the data: AR JH M. Grainger. Contributed reagents/materials/analysis tools: AR JH OV J. Suvisaari M. Gissler M. Grainger ML J. Suokas. Contributed to the writing of the manuscript: AR JH OV J. Suvisaari M. Gissler M. Grainger ML J. Suokas.