1. 2nd Department of Internal Medicine, Osaka Medical and Pharmaceutical University Hospital
2. Department of Gastroenterology, Osaka City University Graduate School of Medicine
3. Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
4. Division of Endoscopy, Hirosaki University Hospital
5. Division of Gastroenterology, Tohoku University Graduate School of Medicine
6. Department of Gastroenterological Endoscopy, Tokyo Medical University Hospital
7. Departments of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine
8. Department of Gastroenterology, Kagawa University Faculty of Medicine
9. Department of Gastroenterology, Japanese Red Cross Kyoto Daiichi Hospital
10. Department of Gastroenterology, Kagawa Prefectural Central Hospital
11. Department of Gastroenterology, Juntendo University School of Medicine
12. Department of Gastroenterology, Graduate School of Medicine, Nippon Medical School
13. Department of Gastroenterology, Faculty of Medicine, Oita University
14. Center for Clinical Research, Hamamatsu University School of Medicine
15. Department of Gastroenterology, Aichi Medical University Hospital
16. Division of Gastroenterology and Nephrology, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University
17. Department of Gastroenterology, Faculty of Medicine, Shimane University
18. Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences
19. Department of Gastroenterology and Hepatology, Keio University School of Medicine