1. Department of Gastroenterology and Hepatology Osaka University Graduate School of Medicine Suita, Osaka Japan
2. Osaka Police Hospital Osaka Japan
3. Kansai Rosai Hospital Amagasaki, Hyogo Japan
4. Japan Community Healthcare Organization Osaka Hospital Osaka Japan
5. Ikeda Municipal Hospital Ikeda, Osaka Japan
6. National Hospital Organization Osaka National Hospital Osaka Japan
7. Itami City Hospital Itami, Hyogo Japan
8. Osaka Rosai Hospital Sakai, Osaka Japan
9. Minoh City Hospital Minoh, Osaka Japan
10. Osaka International Cancer Institute Osaka Japan
11. Osaka General Medical Center Osaka Japan
12. Yao Municipal Hospital Yao, Osaka Japan
13. Hyogo Prefectural Nishinomiya Hospital Nishinomiya, Hyogo Japan
14. Otemae Hospital Osaka Japan