1. Department of Gastroenterology and Hepatology; Osaka University Graduate School of Medicine; Suita Japan
2. Osaka Rosai Hospital; Sakai Japan
3. Higashiosaka City General Hospital; Higashiosaka Japan
4. Sumitomo Hospital; Osaka Japan
5. Kansai Rosai Hospital; Amagasaki Japan
6. National Hospital Organization Osaka National Hospital; Osaka Japan
7. Kaizuka City Hospital; Kaizuka Japan
8. Japan Community Health Care Organization Osaka Hospital; Osaka Japan
9. Toyonaka Municipal Hospital; Toyonaka Japan
10. Osaka Medical Center for Cancer and Cardiovascular Diseases; Osaka Japan
11. National Hospital Organization Minami Wakayama Medical Center; Tanabe Japan
12. Ikeda Municipal Hospital; Ikeda Japan