1. Department of Gastroenterological Surgery; Yokohama City University Graduate School of Medicine; Kanagawa Japan
2. Department of Surgery; Teikyo University School of Medicine; Tokyo Japan
3. Division of General Surgery; Lin-Kou Chang Gung Memorial Hospital; Tauyuan Taiwan
4. Department of Medical Informatics; Niigata University; Niigata Japan
5. Department of Health Policy; National Center for Child Health and Development; Tokyo Japan
6. Department of General Internal Medicine; Japanese Red Cross Nagoya Daini Hospital; Aichi Japan
7. Department of Gastroenterology and Hepatology; Tokyo Medical University Hospital; Tokyo Japan
8. Center for Global Health Mito Kyodo General Hospital University of Tsukuba; Ibaraki Japan
9. Department of Surgery; Yuan's General Hospital; Kaohsiung Taiwan
10. Department of Internal Medicine; National Taiwan University Hospital; National Taiwan University College of Medicine Taipei Taiwan
11. Department of Gastroenterology; Ogaki Municipal Hospital; Gifu Japan
12. Second Department of Surgery; Wakayama Medical University School of Medicine; Wakayama Japan
13. Emeritus Professor; Graduate School of Medicine; Chiba University; Chiba Japan
14. Department of Surgery; Institute of Gastroenterology; Tokyo Women's Medical University; Tokyo Japan