1. Department of Gastroenterology and Hepatology; Osaka University Graduate School of Medicine; Suita Osaka Japan
2. Osaka Police Hospital; Osaka City Osaka Japan
3. National Hospital Organization Osaka National Hospital; Osaka City Osaka Japan
4. Osaka Koseinenkin Hospital; Osaka City Osaka Japan
5. Hyogo Prefectural Nishinomiya Hospital; Nishinomiya Hyogo Japan
6. Toyonaka Municipal Hospital; Toyonaka Osaka Japan
7. Minoh City Hospital; Minoh Osaka Japan
8. Osaka Rosai Hospital; Sakai Osaka Japan
9. Ikeda Municipal Hospital; Ikeda Osaka Japan
10. National Hospital Organization Minami Wakayama Medical Center; Tanabe Wakayama Japan
11. Department of General Medicine; Osaka University Hospital; Suita Osaka Japan
12. Kansai Rosai Hospital; Amagasaki Hyogo Japan