1. Department of Endoscopy; Yokohama City University Hospital; Yokohama Kanagawa Japan
2. Department of Internal Medicine; Tokyo Komagome Metropolitan Hospital; Tokyo Japan
3. Department of Gastroenterology; Graduate School of Medicine; The University of Tokyo; Tokyo Japan
4. Department of Endoscopy; Nagoya University Hospital; Nagoya Aichi Japan
5. Department of Gastroenterology and Hepatology; Kansai Medical University; Hirakata Osaka Japan
6. Department of Gastroenterology; Kobe University Graduate School of Medicine; Kobe Japan
7. Department of Community-based Medical Education; Nagoya City University Graduate School of Medicine; Nagoya Aichi Japan
8. Institute of Gastroenterology; Tokyo Women's Medical University; Tokyo Japan
9. Department of Gastroenterology; Shinshu University Graduate School of Medicine; Matsumoto Nagano Japan
10. Department of Gastroenterology; Tohoku University Graduate School of Medicine; Sendai Miyagi Japan
11. Department of Gastroenterology and Hepatology; Kyoto Prefectural University of Medicine; Kyoto Japan
12. Department of Gastroenterology; Tokyo Medical University; Tokyo Japan
13. Department of Medicine and Bioregulatory Science; Graduate School of Medicine; Kyushu University; Fukuoka Japan
14. Department of Gastroenterology; Fukuoka University Chikushi Hospital; Chikushino Fukuoka Japan
15. Department of Gastroenterology; Tokyo Women's Medical University; Yachiyo Hospital; Tokyo Japan
16. Department of Gastroenterology; Second Teaching Hospital; Fujita Health University; Toyoake Aichi Japan
17. Department of Gastroenterology; Aichi Cancer Center; Nagoya Aichi Japan
18. Department of Gastroenterology; Showa University School of Medicine; Tokyo Japan
19. Department of Surgery; Kyorin University School of Medicine; Tokyo Japan
20. Division of Gastroenterology and Hepatology; Department of Internal Medicine; Keio University; Tokyo Japan
21. Department of Gastroenterology; Aizu Medical Center; Fukushima Medical University; Fukushima Japan
22. Division of Hepato-Biliary-Pancreatic Surgery; Department of Surgery; Kinki University Faculty of Medicine; Osaka Japan
23. Department of Gastroenterology; Kyoto University Graduate School of Medicine; Kyoto Japan