1. Tohoku University School of Medicine
2. Kagoshima University Medical School
3. Kyushu University School of Medicine
4. Tottori University Medical School
5. Yugawa Hospital of Gastroenterology
6. Kyoto Prefectural Medical College
7. Faculty of Medicine, Nagoya City University
8. National Cancer Center
9. Tokyo Medical College
10. Nippon Medical College
11. Iwate Medical College
12. Sapporo Medical College
13. Hokkaido University School of Medicine