1. Department of Gastroenterology Kitasato University School of Medicine Sagamihara Japan
2. Department of Therapeutic Oncology Kyoto University Graduate School of Medicine Kyoto Japan
3. Department of Molecular Pathology Yokohama City University School of Medicine Yokohama Japan
4. Department of Health Promotion National Institute of Public Health Wako Japan
5. Department of Gastroenterology and Endoscopy National Cancer Center Hospital East Kashiwa Japan
6. Department of Otolaryngology Keiyukai Sapporo Hospital Sapporo Japan
7. Department of Gastroenterology Toranomon Hospital Tokyo Japan
8. Endoscopy Division National Cancer Center Hospital Tokyo Japan
9. Department of Otolaryngology ‐ Head and Neck Surgery Kyoto University Kyoto Japan
10. Department of Head and Neck Oncology Cancer Institute Hospital Tokyo Japan
11. Division of Endoscopy Hokkaido University Hospital Sapporo Japan
12. Department of Endoscopy Saku Central Hospital Advanced Care Center Saku Japan
13. Division of Head and Neck Surgery Shizuoka Cancer Center Nagaizumi Japan
14. Department of Gastrointestinal Oncology Osaka International Cancer Institute Osaka Japan
15. Department of Gastroenterology and Hepatology Okayama University Graduate School Okayama Japan
16. Department of Otolaryngology‐Head and Neck Surgery National Defense Medical College Tokorozawa Japan
17. Department of Otorhinolaryngology ‐ Head and Neck Surgery Kitasato University School of Medicine Sagamihara Japan
18. Department of Head and Neck Surgery Miyagi Cancer Center Natori Japan
19. Department of Gastroenterology Akita University School of Medicine Akita Japan
20. Department of Otolaryngology‐ Head and Neck Surgery Kurume University School of Medicine Kurume Japan
21. Department of Otolaryngology‐ Head and Neck Surgery Tokai University Isehara Japan
22. Department of Endoscopy The Jikei University School of Medicine Tokyo Japan
23. Department of Endoscopy NHO Shikoku Cancer Center Matsuyama Japan
24. Department of Gastroenterology Fukuoka University Chikushi Hospital Chikushino Japan
25. Division of Gastroenterology and Hepatology Graduate School of Medical and Dental Sciences Niigata University Niigata Japan
26. Department of Gastroenterology Osaka City University Graduate School of Medicine Osaka Japan
27. Department of Gastroenterology Ishikawa Prefectural Central Hospital Kanazawa Japan
28. Department of Gastrointestinal Surgery Tokyo Medical and Dental University Tokyo Japan
29. Department of Otolaryngology ‐ Head and Neck Surgery Graduate School of Medicine University of Tokyo Tokyo Japan
30. Department of Gastroenterology Kobe City Medical Center General Hospital Kobe Japan
31. Department of Otolaryngology‐Head and Neck Surgery Kyoto Prefectural University of Medicine Kyoto Japan
32. Kitasato Clinical Research Center Kitasato University School of Medicine Sagamihara Japan
33. Department of Pathology Kitasato University School of Medicine Sagamihara Japan
34. Department of Diagnostic Pathology Showa University School of MedicineYokohama Northern Hospital Yokohama Japan
35. Department of Clinical Pathology Sapporo Hokuyu Hospital Sapporo Japan
36. Department of Pathology Pathology and Cytology Laboratories BML INC Tokyo Japan
37. Department of Diagnostic Pathology Shizuoka Cancer Center Nagaizumi Japan
38. Exploratory Oncology Research and Clinical Trial Center National Cancer Center Kashiwa Japan
39. Department of Otorhinolaryngology ‐ Head and Neck Surgery The Jikei University School of Medicine Tokyo Japan
40. Department of Head and Neck Surgery National Cancer Center Hospital East Kashiwa Japan