Marsha Vannicelli is an Associate Professor in the Department of Psychiatry at Harvard Medical School, and Director of Appleton Outpatient Clinic, McLean Hospital--one of the largest dynamically oriented group psychotherapy programs in the United States. The author of "Group Psychotherapy with Adult Children of Alcoholics," she has written and lectured extensively about her research and clinical work with substance abusers and their families--particularly in the area of group psychotherapy. She also maintains a private practice in Belmont, Massachusetts.