Department of Psychiatry (Zwicker, Propper, Denovan-Wright, Alda, Uher) and Department of Pharmacology (Denovan-Wright), Dalhousie University, Halifax, Nova Scotia, Canada; Nova Scotia Health, Halifax (Zwicker, Alda, Uher); Dalhousie Medicine New Brunswick, Saint John, New Brunswick, Canada (Zwicker); Neuroscience Research Australia, Randwick, New South Wales, Australia (Fullerton, Toma, Schofield); School of Medical Sciences, University of New South Wales, Kensington, Australia (Fullerton, Toma, Schofield); Department of Genetics and Genomic Sciences and Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York (Mullins); Wolfson Centre for Young People’s Mental Health, Section of Child and Adolescent Psychiatry, Division of Psychological Medicine and Clinical Neurosciences, and MRC Centre for Neuropsychiatric Genetics and Genomics, Division of Psychological Medicine and Clinical Neurosciences, Cardiff University, Cardiff, U.K. (Rice, Powell, Thapar); Western Psychiatric Hospital, University of Pittsburgh School of Medicine, Pittsburgh (Hafeman, Merranko, Birmaher); Department of Child and Adolescent Psychiatry/Psychology, Erasmus University Medical Center, Sophia Children’s Hospital, Rotterdam, the Netherlands (van Haren, Setiaman, Hillegers); Department of Psychiatry, University Medical Center Utrecht Brain Center, Utrecht, the Netherlands (van Haren, Setiaman, Hillegers); Center for Addiction and Mental Health, University of Toronto Faculty of Medicine, Ontario (Goldstein); Department of Psychiatry (Ferrera, Nurnberger) and Stark Neurosciences Research Institute (Nurnberger), Indiana University School of Medicine, Indianapolis; NIMH, Bethesda, Md. (Stapp); Institut d’Investigacions Biomèdiques Agustí Pi i Sunyer (IDIBAPS), Barcelona, Spain (de la Serna, Sugranyes, Castro-Fornieles); Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Spain (de la Serna, Moreno, Sugranyes, Castro-Fornieles); Department of Child and Adolescent Psychiatry and Psychology, Institute of Neuroscience, Hospital Clinic of Barcelona, Spain (de la Serna, Sugranyes, Castro-Fornieles); Child and Adolescent Psychiatry Department, Hospital General Universitario Gregorio Marañón, Madrid (Moreno); Department of Psychiatry, Universitat de Barcelona, Spain (Herrero); School of Psychiatry, University of New South Wales, Randwick, New South Wales, Australia (Roberts, Mitchell); Centro de Biología Molecular “Severo Ochoa,” Universidad Autónoma de Madrid/CSIC, Madrid (Toma); Department of Biochemistry and Molecular Biology, Indiana University, Indianapolis (Edenberg); Department of Psychiatry and Behavioral Sciences, Division of Child Psychiatry and Public Health, Johns Hopkins Medicine, and Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore (Wilcox); Department of Psychiatry, University of Michigan, Ann Arbor (McInnis); IWK Health Centre, Halifax (Propper); Montreal Neurological Institute and Department of Neurology, McGill University, Montreal (Rouleau); Department of Medicine, University of Barcelona, Barcelona, Spain (Castro-Fornieles); Social, Genetic, and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology, and Neuroscience, King’s College London (Lewis).