Bernard Timothy Walsh, MD, FAED, is the William and Joy Ruane Professor of Pediatric Psychopharmacology in the Department of Psychiatry at Columbia University and the author, editor, and co-editor of five books on adolescent health and eating disorders. He has served as President of both the Academy for Eating Disorders and the Eating Disorders Research Society, and chaired the Eating Disorders Work Group for both DSM-IV and DSM-5.