This practical, easy-to-use guide is a staple in health care facilities that treat adolescents, is widely used for board preparation, and is recommended by the American College of Physicians for their internal medicine library. This edition has four new Associate Editors and new contributors for almost all chapters. The substance abuse section has been completely reorganized. New chapters cover psychosomatic illness and complementary medicine. Each chapter lists Websites where professionals, teenagers, and parents can find up-to-the-minute information.