?Massoud Mahmoudi DO., Ph.D., is a Clinical Professor in the Department of Medicine at the University of California San Francisco. He is also a faculty member at two other medical schools: Rowan University and Touro University. As a faculty member of three medical schools, Dr. Mahmoudi has been involved with teaching internal medicine residents, allergy and immunology fellows and medical students for the past twenty years. He is an active medical practitioner in internal medicine as well as allergy and clinical immunology. He is the Editor-in-Chief of the peer-reviewed Comprehensive Clinical Medicine and has published approximately 11 books.