Shirin H, Moss S F
Department of Medicine, Division of Gastroenterology, St Luke's-Roosevelt Hospital Center, College of Physicians and Surgeons, Columbia University, S&R 12, 1111 Amsterdam Ave, New York, NY 10025, USA.
Gut. 1998 Nov;43(5):592-4. doi: 10.1136/gut.43.5.592.