| Affiliation: | 1. Gastroenterology Division, Saiseikai Yokohama‐shi Nanbu Hospital, Yokohama, Japan;2. Gastroenterology Division, Yokohama City University School of Medicine, Yokohama, Japan;3. Department of Biostatistics and Epidemiology, Yokohama City University School of Medicine, Yokohama, Japan;4. Department of Gastroenterology, Machida Municipal Hospital, Machida, Tokyo, Japan;5. Department of Gastroenterology, International University of Health and Welfare Atami Hospital, Atami, Shizuoka, Japan;6. Department of Gastroenterology, Tokyo Metropolitan, Hiroo General Hospital, Shibuya‐ku, Tokyo, Japan;7. Department of Gastroenterology, Yokosuka City Hospital, Yokosuka, Kanagawa, Japan;8. Department of Gastroenterology, Yokohama Minami Kyosai Hospital, Yokosuka, Kanagawa, Japan;9. Department of Gastroenterology, NTT Medical Center Tokyo, Gotanda, Tokyo, Japan;10. Department of Gastroenterology and Hepatology, Yokohama City University School of Medicine, Yokohama, Japan |
