| Affiliation: | 1. Sapporo City General Hospital, Hokkaido, Japan;2. Hakodate City General Hospital, Hokkaido, Japan;3. JCHO Hokkaido Hospital, Hokkaido, Japan;4. Hakodate Medical Association Hospital, Hokkaido, Japan;5. Japanese Red Cross Kitami Hospital, Hokkaido, Japan;6. Department of Gastroenterology and Hepatology, Graduate School of Medicine, Hokkaido University, Hokkaido, Japan;7. Kushiro Rosai Hospital, Hokkaido, Japan;8. Tomakomai City Hospital, Hokkaido, Japan;9. Touei Hospital, Hokkaido, Japan;10. NTT EAST Sapporo Hospital, Hokkaido, Japan;11. Hokkaido Gastroenterology Hospital, Hokkaido, Japan |
