1. Research and Development Center for New Medical FrontiersKitasato University School of Medicine Kanagawa Japan
2. Department of EndoscopyHiroshima University Hospital Hiroshima Japan
3. Department of Medical StatisticsToho University Tokyo Japan
4. Department of Molecular‐Targeting Cancer Prevention, Graduate School of Medical ScienceKyoto Prefectural University of Medicine Kyoto Japan
5. Department of GastroenterologyKitasato University School of Medicine Kanagawa Japan
6. Endoscopy DivisionNational Cancer Center Hospital Tokyo Japan
7. Department of GastroenterologyItami City Hospital Osaka Japan
8. Digestive Disease CenterShowa University Northern Yokohama Hospital Kanagawa Japan
9. Department of Gastroenterology and EndoscopyNational Cancer Center Hospital East Chiba Japan
10. Department of EndoscopyCancer Institute Ariake Hospital Tokyo Japan
11. Digestive Disease CenterAsahikawa City Hospital Hokkaido Japan
12. Institute of GastroenterologyTokyo Women's Medical University Tokyo Japan
13. Department of GastroenterologyFukuoka University Chikushi Hospital Fukuoka Japan
14. Division of Gastroenterology, Department of MedicineKurume University School of Medicine Fukuoka Japan
15. Gastrointestinal CenterSano Hospital Hyogo Japan
16. Department of GastroenterologyAkita Red Cross Hospital Akita Japan
17. Department of GastroenterologyJR West Osaka Railway Hospital Osaka Japan
18. Department of Gastroenterology, Toranomon Hospital and Cancer CenterKeio University Tokyo Japan
19. Department of SurgeryTeikyo University School of Medicine Tokyo Japan
20. Department of GastroenterologyAkasaka Endoscopic Clinic Tokyo Japan
21. GastroenterologyTakahiro Fujii Clinic Tokyo Japan
22. Tokyo Medical and Dental University Tokyo Japan