Doctor of Medicine from Albany United University School of Medicine in 1972 and M.P.H. from Columbia University in New York in 2000. He is currently professor of medicine at Harvard Medical School and clinical director of the Department of Digestive Medicine at Brigham Women's Hospital in Boston. Founding editor and co-editor of the US Journal of traumatic Enteropathy. Editor of the Journal of Scientific American Gastroenterology, Hepatology, and Endoscopy.