Edgar P. Nace, M.D., is a Board certified psychiatrist with added qualifications in addiction psychiatry and forensic psychiatry. He is Clinical Professor of Psychiatry at The University of Texas Southwestern Medical Center in Dallas, Medical Director at Turtle Creek Manor in Dallas, and in the private practice of adult psychiatry. Joyce A. Tinsley, M.D., is a board-certified addiction psychiatrist. She is a distinguished fellow of the American Psychiatric Association, an elected member of the American College of Psychiatrists, and is past Executive Director of the American Association of Dire...