Dwight L. Evans, MD, is Roerhoff Rickels Professor of Psychiatry at Perelman School of Medicine, University of Pennsylvania. Edna B. Foa, PhD, is Professor of Clinical Psychology in Psychiatry at Perelman School of Medicine, University of Pennsylvania. Raquel E. Gur, MD, PhD, is Professor of Psychiatry, Neurology, and Radiology at Perelman School of Medicine, University of Pennsylvania. Herbert Hendin, MD, is CEO and Medical Director of Suicide Prevention Initiatives. Charles P. O'Brien, MD, PhD, is Kenneth E. Appel Professor Psychiatry at Perelman School of Medicine, University of Pennsylvania. Daniel Romer, PhD, is Research Director at the Annenberg Public Policy Center, University of Pennsylvania. Martin E.P. Seligman, PhD, is Zellerbach Family Professor of Psychology, Director of the Positive Psychology Center at the University of Pennsylvania. B. Timothy Walsh, MD, is William and Joy Ruane Professor of Pediatric Psychopharmacology, Department of Psychiatry, at Columbia University Medical Center.