LeadMood Disorders Psychopharmacology Unit, University Health Network, Toronto (McIntyre, Rosenblat, Y. Lee, Lui, Mansur); Department of Psychiatry, University of Toronto, Toronto (McIntyre, Rosenblat, Mansur); Department of Pharmacology, University of Toronto, Toronto (McIntyre); Brain and Cognition Discovery Foundation, Toronto (McIntyre, Subramaniapillai); Canadian Rapid Treatment Center of Excellence, Mississauga, Ontario (Rosenblat, Kratiuk); Department of Psychiatry and Behavioral Sciences, Austin Dell Medical School, University of Texas, Austin (Nemeroff); Department of Psychiatry, Yale University School of Medicine, New Haven, Conn. (Sanacora); Depression and Anxiety Center for Discovery and Treatment, Department of Psychiatry, and Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York (Murrough); Deakin University, Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Geelong, Australia (Berk, Dodd); Orygen, National Centre of Excellence in Youth Mental Health, Centre for Youth Mental Health, Florey Institute for Neuroscience and Mental Health and the Department of Psychiatry, University of Melbourne, Melbourne, Australia (Berk); Department of Psychiatry, Queen's University School of Medicine, and Centre for Neuroscience Studies, Queen's University, Kingston, Ontario (Brietzke); Centre for Youth Mental Health and Department of Psychiatry, University of Melbourne, Melbourne, Australia (Dodd); Université de Paris, Institute of Psychiatry and Neuroscience of Paris, INSERM U1266, and GHU Paris Psychiatrie et Neurosciences, CMME, Hôpital Sainte-Anne, Paris (Gorwood); Department of Psychological Medicine, Yong Loo Lin School of Medicine, and Institute of Health Innovation and Technology, National University of Singapore, Singapore (Ho); Department of Psychiatry, NYU School of Medicine, and Clinical Research Division, Nathan Kline Institute for Psychiatric Research, Orangeburg, New York (Iosifescu); Department of Psychiatry, Universidad de Antioquia, Medellin, Colombia (Lopez Jaramillo); Center for Brain Research, Medical University of Vienna, Vienna (Kasper); Department of Clinical Immunology, Poznan University of Medical Sciences, Poznan, Poland (Kratiuk); Department of Psychiatry, College of Medicine, Haeundae Paik Hospital, Paik Institute for Clinical Research, and Department of Health Science and Technology, Graduate School, Inje University, Busan, Republic of Korea (J.G. Lee); Institute of Medical Science, University of Toronto, Toronto (Y. Lee); Clinical Trials Network and Institute, Massachusetts General Hospital, Boston (Papakostas); Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, and Corporal Michael J. Crescenz VA Medical Center, Philadelphia (Thase); Hospital Clinic, Institute of Neuroscience, University of Barcelona, IDIBAPS, CIBERSAM, Barcelona (Vieta); Department of Psychological Medicine, Institute of Psychiatry, Psychology, and Neuroscience, King's College London and South London, and Maudsley NHS Foundation Trust, Bethlem Royal Hospital, Beckenham, Kent (Young); Experimental Therapeutics and Pathophysiology Branch and Section on the Neurobiology and Treatment of Mood Disorders, Division of Intramural Research Program, NIMH, Bethesda, Md. (Zarate); Department of Psychiatry and Neuroscience, University of California, Riverside, and University of California, San Diego (Stahl).