1. Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
2. Department of Gastroenterology, Tohoku Rosai Hospital, Sendai, Japan
3. Department of Gastroenterology, Akita City Hospital, Akita, Japan
4. Takagi Clinic, Sendai, Japan
5. Department of Gastroenterology, South Miyagi Medical Center, Ohgawara, Japan
6. Department of Gastroenterology, Iwate Prefectural Iwai Hospital, Ichinoseki, Japan
7. Department of Gastroenterology, NHO Sendai Medical Center, Sendai, Japan
8. Department of Gastroenterology, Tohoku Medical and Pharmaceutical University, Sendai, Japan
9. Department of Gastroenterology, Osaki Citizen Hospital, Osaki, Japan
10. Department of Gastroenterology and Neurology, Akita University Graduate School of Medicine, Akita, Japan
11. Department of Gastroenterology, Sendai City Hospital, Sendai, Japan
12. Department of Gastroenterology, Iwate Prefectural Isawa Hospital, Oshu, Japan
13. Department of Gastroenterology, Japanese Red Cross Sendai Hospital, Sendai, Japan
14. Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
15. Advanced Research Center for Innovations in Next-Generation Medicine, Tohoku University, Sendai, Japan
16. Department of Pediatrics, Gunma University Graduate School of Medicine, Maebashi, Japan
17. Student Health Care Center, Institute for Excellence in Higher Education, Tohoku University, Sendai, Japan