| Affiliation: | 1. First Department of Internal Medicine, Gifu University Hospital, Japan;2. Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan;3. Department of Gastroenterology, Aichi Cancer Center Hospital, Aichi, Japan;4. Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan;5. Division of Gastroenterology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea |
