1Department of Gastroenterology, Toyonaka Municipal Hospital, Toyonaka-shi, Osaka, Japan
2Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
3Gastroenterological Endoscopy, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan
4Department of Gastroenterology and Hepatology, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
5Department of Gastroenterology, Nagasaki Harbor Medical Center, Nagasaki-shi, Nagasaki, Japan
6Department of Gastroenterology, Fukui Prefectural Hospital, Fukui-shi, Fukui, Japan
7Department of Gastroenterology, St. Luke's International Hospital, Chuo-ku, Tokyo, Japan
8Department of Gastroenterology, Ishikawa Prefectural Central Hospital, Kanazawa-shi, Ishikawa, Japan
9Department of Gastroenterology, Tonan Hospital, Sapporo-shi, Hokkaido, Japan
10Department of Gastroenterology, Otaru Ekisaikai Hospital, Otaru-shi, Hokkaido, Japan
11Department of Gastroenterology, Sapporo Century Hospital, Sapporo-shi, Hokkaido, Japan
12Department of Gastroenterology, Shuto General Hospital, Yanai-shi, Yamaguchi, Japan
13Department of Gastroenterology and Hepatology, National Center for Global Health and Medicine Kohnodai Hospital, Ichikawa-shi, Chiba, Japan
14Department of Gastroenterology, Japan Community Healthcare Organization Osaka Hospital, Osaka-shi, Osaka, Japan
15Department of Information and Computer Technology, Faculty of Engineering, Tokyo University of Science, Tokyo, Japan
16Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya-shi, Aichi, Japan
✉Corresponding author Tsutomu Nishida, PhD, MD Department of Gastroenterology, Toyonaka Municipal Hospital, 4-14-1 Shibahara, Toyonaka, Osaka 560-8565, Japan, FAX: +81-6-6858-3531, Email: tnishida.gastro@gmail.com
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