1. Kumagai Satellite Clinic
2. Department of Surgery, Tokai University, School of Medicine
3. Endoscopic Centre, Keio University, School of Medicine
4. Colo-proctology center, Social Insurerance Central Hospital
5. Department of Internal Medicine, Social Insurerance Central Hospital
6. Department of Internal Medicine, Tokai University, Tokyo Hospital
7. Okamotoheiji Clinic
8. Kouchi Clinic