1. Tokyo Hp Study Group, Tokyo, Japan
2. Department of Gastroenterology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
3. Department of Gastroenterology and Hepatology, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, 259-1193, Japan
4. Tokyo Hp Study Group Tokyo, Japan
5. Gastroenterology Division, St. Luke’s International Hospital, Tokyo, Japan
6. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
7. Department of Gastroenterology, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
8. Department of General Medicine and Primary Care, Tokyo Medical University Hospital, Tokyo, Japan
9. Mizuno Icho Clinic, Tokyo, Japan
10. Department of Surgery, Nerima General Hospital, Tokyo, Japan
11. Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
12. Foundation for Detection of Early Gastric Carcinoma, Tokyo, Japan
13. Department of Gastroenterology, Yotsuya Medical Cube, Tokyo, Japan
14. Tokyo Daiya Clinic, Tokyo, Japan
15. Department of Gastroenterology, Juntendo Shizuoka Hospital, Shizuoka, Japan
16. Department of Gastroenterology, Tama-Nagayama University Hospital, Tokyo, Japan
17. Torii Medical Clinic, Tokyo, Japan
18. Digestive Disease Center, International University of Health and Welfare, Mita Hospital, Tokyo, Japan
19. Department of Gastroenterology and Hepatology, Tokai University, School of Medicine, Isehara, Japan
20. Department of Gastroenterology and Hepatology, The Jikei University School of Medicine Kashiwa Hospital, Chiba, Japan
21. Endoscopy Center, Tokyo Medical University Hospital, Tokyo, Japan
22. Department of General Medicine, Kyorin University School of Medicine, Tokyo, Japan
23. Department of Gastroenterology, Kosei Hospital, Tokyo, Japan