About the Authors

Qi Chen

Roles Data curation, Formal analysis, Methodology, Visualization, Writing – original draft, Writing – review & editing

qi.chen@ki.se

Affiliation Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden

Catharina A. Hartman

Roles Conceptualization, Funding acquisition, Investigation, Project administration, Writing – review & editing

Affiliation Department of Psychiatry, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands

Jan Haavik

Roles Funding acquisition, Writing – review & editing

Affiliations Division of Psychiatry, Haukeland University Hospital, Bergen, Norway, K.G. Jebsen Centre for Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Bergen, Norway

Jaanus Harro

Roles Funding acquisition, Writing – review & editing

Affiliation Division of Neuropsychopharmacology, Department of Psychology, University of Tartu, Tartu, Estonia

Kari Klungsøyr

Roles Funding acquisition, Writing – review & editing

Affiliations Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway, Division of Mental and Physical Health, Norwegian Institute of Public Health, Bergen, Norway

Tor-Arne Hegvik

Roles Writing – review & editing

Affiliations Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, K.G. Jebsen Centre for Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Bergen, Norway

Rob Wanders

Roles Writing – review & editing

Affiliation Department of Psychiatry, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands

Cæcilie Ottosen

Roles Writing – review & editing

Affiliations National Centre for Register-based Research, Aarhus University, Aarhus, Denmark, The Lundbeck Foundation Initiative for Integrative Psychiatric Research, iPSYCH, Aarhus, Denmark

Søren Dalsgaard

Roles Funding acquisition, Writing – review & editing

Affiliations National Centre for Register-based Research, Aarhus University, Aarhus, Denmark, The Lundbeck Foundation Initiative for Integrative Psychiatric Research, iPSYCH, Aarhus, Denmark, Department for Child and Adolescent Psychiatry, Hospital of Telemark, Kragerø, Norway

Stephen V. Faraone

Roles Funding acquisition, Writing – review & editing

Affiliations K.G. Jebsen Centre for Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Bergen, Norway, Departments of Psychiatry and Neuroscience and Physiology, SUNY Upstate Medical University, New York, United States of America

Henrik Larsson

Roles Conceptualization, Funding acquisition, Methodology, Resources, Supervision, Writing – original draft, Writing – review & editing

Affiliations Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, School of Medical Sciences, Örebro University, Örebro, Sweden

Competing Interests

In the past year, Dr. Faraone received income, potential income, travel expenses continuing education support and/or research support from Otsuka, Lundbeck, KenPharm, Rhodes, Arbor, Ironshore, Shire, Akili Interactive Labs, CogCubed, Alcobra, VAYA, Sunovion, Genomind and NeuroLifeSciences. With his institution, he has US patent US20130217707 A1 for the use of sodium-hydrogen exchange inhibitors in the treatment of ADHD. Dr. Larsson has served as a speaker for Eli-Lilly and has received research grants from Shire. Dr. Haavik has served as a speaker for Eli-Lilly, HB Pharma and Shire. The other authors declare no competing interests. This does not alter our adherence to PLOS ONE policies on sharing data and materials.