James Lock, MD, PhD, is Professor of Psychiatry and Behavioral Sciences at Stanford University. Daniel Le Grange, PhD, is the Benioff UCSF Professor in Children's Health in the Departments of Psychiatry and Pediatrics at the University of California, San Francisco. For related resources from Drs. Lock and Le Grange, including the bestselling parent guide Help Your Teenager Beat an Eating Disorder, Second Edition, visit www.guildford.com/lock.