1. Department of Gastroenterology and Hepatology Osaka University Graduate School of Medicine Osaka Japan
2. Department of Gastrointestinal Oncology Osaka International Cancer Institute Osaka Japan
3. Nishiyama Gastroenterology Clinic Osaka Japan
4. Department of Gastroenterology and Hepatology Suita Municipal Hospital Osaka Japan
5. Department of Gastroenterology Toyonaka Municipal Hospital Osaka Japan
6. Department of Gastroenterology Osaka Rosai Hospital Osaka Japan
7. Department of Gastroenterology Osaka Police Hospital Osaka Japan
8. Department of Gastroenterology Itami City Hospital Itami Hyogo Japan
9. Department of Gastroenterology Kansai Rosai Hospital Amagasaki Hyogo Japan
10. Department of Gastroenterology Osaka General Medical Center Osaka Japan
11. Department of Pathology Osaka University Graduate School of Medicine Osaka Japan