Mark McGovern, Ph.D., is an associate professor of Psychiatry and of Community and Family Medicine at Dartmouth Medical School, specializing in the treatment of co-occurring substance use and psychiatric disorders. He is an author of the Hazelden Co-occurring Disorders Program, designed for professionals in treatment and mental health. Living with Co-Occurring Addiction and Mental Health Disorders: A Handbook for Recovery is his latest book. He lives in New Hampshire.