1. Department of Gastroenterology and HepatologyOsaka University Graduate School of Medicine Suita Japan
2. Osaka International Cancer Institute Osaka Japan
3. Osaka Rosai Hospital, Sakai Osaka Japan
4. Kansai Rosai Hospital Amagasaki Japan
5. Osaka Police Hospital Osaka Japan
6. National Hospital Organization Osaka Minami Medical Center Kawachinagano Japan
7. Minoh City Hospital Minoh Japan
8. Ikeda Municipal Hospital Ikeda Japan