1. Kawaguchi Gastroenterology Clinic
2. Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine
3. Oka Medical Clinic
4. Department of Gastroenterology, Keiyu Hospital
5. Ogiwara Clinic
6. Department of Gastroenterology, Saiseikai Yokohama-shi Nanbu Hospital
7. Kimura Internal Medicine and Gastroenterology Clinic
8. Kannai Sandou Internal Medicine Clinic
9. Tarao Internal Medicine and Gastroenterology Clinic
10. Nagai Internal Medicine Clinic
11. Department of Gastroenterology, Yokohama City University Graduate School of Medicine