This digestive disease expert is a Professor of Medicine at a prominent university. He has over 25 years of experience with digestive diseases, diarrheal disorders and food-borne illnesses. His clinical interests include general gastroenterology, diarrheal disease, inflammatory bowel disease, irritable bowel syndrome. He has published more than 100 articles and over 50 textbook chapters related to digestive disease. He is an M.D. and has been engaged as an expert witness in a case related to digestive disease.