| Affiliation: | 1. Department of Gastroenterology, NTT Medical Center Tokyo, Tokyo, Japan;2. Second Department of Internal Medicine, Shimane University School of Medicine, Shimane, Japan;3. Department of Gastroenterology, The Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo, Japan;4. Department of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan;5. Department of Gastroenterology, Sapporo Shirakaba‐dai Hospital, Sapporo, Japan;6. Sakura Gastroenterology and Digestive Surgery, Susono, Japan;7. Department of Endoscopy, Kaken Hospital, International University of Health and Welfare, Ichikawa, Japan;8. Center for Clinical Research, Hamamatsu University School of Medicine, Hamamatsu, Japan;9. Department of Gastroenterology, Department of Internal Medicine, Kawasaki Medical School, Okayama, Japan |
