John C. Markowitz, MD received his medical degree from Columbia University College of Physicians & Surgeons and his psychiatric residency training at the Payne Whitney Clinic of Cornell University/New York Hospital in New York. He had the fortune to work with the two founders of Interpersonal Psychotherapy (IPT): the late Gerald L. Klerman, MD at Cornell, and Myrna M. Weissman, PhD at Columbia University. Currently, he is a Professor of Clinical Psychiatry at Columbia University Vagelos College of Physicians & Surgeons and a Research Psychiatrist at New York State Psychiatric Institute. Dr. Markowitz has spent decades studying the effects of psychotherapies and medications in the treatment of depression, anxiety, personality disorders, and posttraumatic stress disorder with funding from the National Institute of Mental Health and other foundations.