1. Departments of Gastroenterology (K. Shim., K. Shir., S.W., N.H.), Tokyo Women’s Medical College, Tokyo 162, Japan
2. Pathology (Y.K., M.K.), Tokyo Women’s Medical College, Tokyo 162, Japan
3. Pediatrics (Y.D., R.F.), University of Rochester Medical Center, Rochester, New York 14642
4. Departments of Medicine (Y.S., T.-M.C., W.Y.C.), University of Rochester Medical Center, Rochester, New York 14642