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