The Psychiatric and Neurodevelopmental Genetics Unit, Center for Genomic Medicine, Department of Psychiatry, Massachusetts General Hospital, Boston (Yu, Illmann, Osiecki, Smoller, Pauls, Neale, Scharf); the Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, Mass. (Yu, Neale, Scharf); the Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, University of California, Los Angeles (Sul, Huang, Zelaya, Ophoff, Freimer, Coppola); the Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles (Sul, Huang, Zelaya, Freimer, Coppola); the Department of Molecular Biology and Genetics, Democritus University of Thrace, Xanthi, Greece (Tsetsos); the Department of Biological Sciences, Purdue University, West Lafayette, Ind. (Tsetsos, Paschou); deCODE Genetics/Amgen, Reykjavik, Iceland (Nawaz, H. Stefansson, K. Stefansson); the Bioinformatics Interdepartmental Program, University of California, Los Angeles (Huang, Zelaya); the Department of Psychiatry, University of California, San Francisco (Darrow); the Department of Psychiatry, UCSF Weill Institute for Neurosciences, University of California, San Francisco (Hirschtritt, Willsey); the Department of Psychiatry, Massachusetts General Hospital, Boston (Greenberg, Roffman, Buckner); the Clinic of Psychiatry, Social Psychiatry, and Psychotherapy, Hannover Medical School, Hannover, Germany (Muller-Vahl); the Institute of Human Genetics, Hannover Medical School, Hannover, Germany (Stuhrmann); McGill University Health Center, University of Montreal, McGill University Health Centre, Montreal (Dion); the Montreal Neurological Institute, Department of Neurology and Neurosurgery, McGill University, Montreal (Rouleau); the Department of Psychiatry and Psychotherapy, Medical University Vienna, Vienna (Aschauer, Stamenkovic); Biopsychosocial Corporation, Vienna (Aschauer, Schlögelhofer); University Health Network, Youthdale Treatment Centres, and University of Toronto, Toronto (Sandor); the Krembil Research Institute, University Health Network, Hospital for Sick Children, and University of Toronto, Toronto (Barr); Johns Hopkins University School of Medicine, Baltimore (Grados, Singer); the Institute of Human Genetics, University Hospital Bonn, University of Bonn Medical School, Bonn, Germany (Nöthen); the Department of Child and Adolescent Psychiatry, Psychosomatics, and Psychotherapy, University Hospital Essen, University of Duisburg-Essen, Essen, Germany (Hebebrand, Hinney); the Yale Child Study Center and the Department of Psychiatry, Yale University School of Medicine, New Haven, Conn. (King, Fernandez); the Institute of Medical Chemistry, Molecular Biology, and Pathobiochemistry, Semmelweis University, Budapest, Hungary (Barta); Vadaskert Child and Adolescent Psychiatric Hospital, Budapest, Hungary (Tarnok, Nagy); the Institute of Human Genetics, University Hospital Essen, University Duisburg-Essen, Essen, Germany (Depienne); Sorbonne Universités, UPMC Université Paris 06, UMR S 1127, CNRS UMR 7225, ICM, Paris (Depienne, Worbe, Hartmann); French Reference Centre for Gilles de la Tourette Syndrome, Groupe Hospitalier Pitié-Salpêtrière, Paris (Worbe, Hartmann); Assistance Publique-Hôpitaux de Paris, Department of Neurology, Groupe Hospitalier Pitié-Salpêtrière, Paris (Worbe, Hartmann); Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York (Budman); Child Neuropsychiatry, Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy (Rizzo); the Stanley Institute for Cognitive Genomics, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York (Lyon); the Department of Psychiatry, University of Utah, Salt Lake City (McMahon); Children's Mercy Hospital, Kansas City, Mo. (Batterson); the Department of Psychiatry, University Medical Center Groningen and Rijksuniversity Groningen, and Drenthe Mental Health Center, Groningen, the Netherlands (Cath); the Department of Neurology, Fixel Center for Neurological Diseases, McKnight Brain Institute, University of Florida, Gainesville (Malaty, Okun); Pennsylvania State University College of Medicine, Hershey (Berlin); Marquette University and University of Wisconsin-Milwaukee, Milwaukee (Woods); Tripler Army Medical Center and University of Hawaii John A. Burns School of Medicine, Honolulu (Lee); Parkinson's Disease Center and Movement Disorders Clinic, Department of Neurology, Baylor College of Medicine, Houston (Jankovic); the Division of Psychiatry, Department of Neuropsychiatry, University College London (Robertson); the Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati (Gilbert); Children's Hospital of Philadelphia, Philadelphia (Brown); the Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami (Coffey); the Department of Child and Adolescent Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (Dietrich, Hoekstra); University of Iowa Carver College of Medicine, Iowa City (Kuperman); the Department of Pediatrics, University of Washington, Seattle (Zinner); the Department of Pediatrics, Landspitalinn University Hospital, Reykjavik, Iceland (Luðvigsson, Thorarensen); the Faculty of Medicine, University of Iceland, Reykjavík, Iceland (Sæmundsen, Stefansson); the State Diagnostic and Counselling Centre, Kópavogur, Iceland (Sæmundsen); the Department of Genetics and the Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (Atzmon, Barzilai); the Department of Human Biology, Haifa University, Haifa, Israel (Atzmon); the Department of Psychiatry and Psychotherapy, University of Bonn, Bonn, Germany (Wagner); the Department of Psychiatry and Psychotherapy, University of Tübingen, Tübingen, Germany (Moessner); SUNY Downstate Medical Center Brooklyn, New York (C.M. Pato, M.T. Pato, Knowles); the Athinoula A. Martinos Center for Biomedical Research, Department of Radiology, Massachusetts General Hospital, Charlestown (Roffman, Buckner); the Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston (Smoller); the Center for Brain Science and Department of Psychology, Harvard University, Cambridge, Mass. (Buckner); the Institute for Neurodegenerative Diseases, UCSF Weill Institute for Neurosciences, University of California San Francisco, San Francisco (Willsey); the Department of Genetics and the Human Genetics Institute of New Jersey, Rutgers, the State University of New Jersey, Piscataway (Tischfield, Heiman); the Department of Complex Trait Genetics, Center for Neurogenomics and Cognitive Research, VU University Amsterdam, Amsterdam (Posthuma); the Division of Genetic Medicine, Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, Tenn. (Cox, Davis); the Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital, Boston (Neale); the Department of Psychiatry, Genetics Institute, University of Florida, Gainesville (Mathews); and the Department of Neurology, Brigham and Women's Hospital, and the Department of Neurology, Massachusetts General Hospital, Boston (Scharf).