1. Department of Gastroenterology Nara Medical University Nara Japan
2. Department of Gastroenterology Faculty of Medicine Yamagata University Yamagata Japan
3. Department of Gastroenterology and Hepatology Musashino Red Cross Hospital Tokyo Japan
4. Division of Gastroenterology Department of Medicine Kurume University School of Medicine Fukuoka Japan
5. Department of Gastroenterological Surgery Hyogo College of Medicine Nishinomiya Japan
6. Department of Surgery Graduate School of Medicine Kyoto University Kyoto Japan
7. Department of Gastroenterology National Hospital Organization Nagasaki Medical Center Nagasaki Japan
8. Department of Radiology Hyogo College of Medicine Nishinomiya Japan