| Affiliation: | 1. Department of Internal Medicine, Division of Gastroenterology and Hepatology, St. Marianna University, school of medicine, Kawasaki, Japan;2. Hepato‐Biliary‐Pancreatic Center, Shonan Fujisawa Tokushukai Hospital, Fujisawa, Japan;3. Division of Gastroenterology and Hepatology, Kawasaki Municipal Tama Hospital, Kawasaki, Japan;4. Department of Gastroenterology, Japan Labour Health and Welfare Organization Kanto Rosai Hospital, Kawasaki, Japan;5. Digestive Disease Center, Showa University Northern Yokohama Hospital, Yokohama, Japan;6. Division of Gastroenterology, St. Marianna University School of Medicine, Yokohama City Seibu Hospital, Yokohama, Japan |
