1. Division of Gastroenterology and Hepatology; Department of Internal Medicine; Keio University School of Medicine; Tokyo Japan
2. Tokyo Eki Center Building Clinic; Tokyo Japan
3. Division of Gastroenterology; Yokohama Minami Kyosai Hospital; Yokohama Japan
4. Department of Gastroenterology; Aichi Medical University; Nagakute Japan
5. Division of Gastroenterology; National Tokyo Medical Center; Tokyo Japan
6. Department of Gastroenterology; Kyoto Prefectural University of Medicine; Kyoto Japan
7. Hayakawa Clinic; Tokai Japan
8. Department of Gastroenterology; Nagoya City University School of Medicine; Nagoya Japan
9. Division of Gastroenterology; Social Insurance Kyoto Hospital; Kyoto Japan
10. Division of Gastroenterology; Eiju General Hospital; Tokyo Japan
11. Tokura Yoshifumi Gastroenterology Clinic; Kameoka Japan
12. Department of Internal Medicine; Keiyu Hospital; Yokohama Japan
13. Department of Clinical Research; National Center for Global Health and Medicine; Tokyo Japan
14. Ogikubo GI Clinic; Tokyo Japan
15. Meito Hospital; Nagoya Japan
16. Department of Regenerative Medicine and Tissue Engineering; National Cerebral and Cardiovascular Center Research Institute; Osaka Japan
17. Department of Public Health; Keio University School of Medicine; Tokyo Japan
18. Department of Gastroenterology; National Defense Medical College; Tokorozawa Japan
19. Division of Gastroenterology, Kohnodai Hospital; National Center for Global Health and Medicine; Ichikawa Japan
20. Translational Research Center for Gastrointestinal Disorders (TARGID); University of Leuven; Leuven Belgium