1. Department of Gastroenterology, Hiroshima City North Medical Center Asa Citizens Hospital
2. Department of Gastroenterology, Hiroshima University Hospital
3. Department of Endoscopy, Hiroshima University Hospital
4. Kawamura Clinic
5. Department of Gastroenterology, Mazda Hospital
6. Department of Endoscopy, Hiroshima Prefectural Hospital
7. Department of Gastroenterology, Onomichi General Hospital
8. Department of Internal Medicine, Hiroshima City Hiroshima Citizens Hospital
9. Department of Gastroenterology, Miyoshi Medical Association Hospital