1. Center for Community Medicine; Jichi Medical University; Tochigi Japan
2. Department of Surgery, Division of Gastroenterological, General and Transplant Surgery; Jichi Medical University; Tochigi Japan
3. Scientific Research Works Peer Support Group (SRWS-PSG); Osaka Japan
4. Division of Gastroenterology; Tohoku University Graduate School of Medicine; Sendai Japan
5. Medical Education Center; Jichi Medical University; Tochigi Japan
6. Department of General Medicine; Tottori Municipal Hospital; Tottori Japan
7. Department of Internal Medicine; Kyoto Min-Iren Asukai Hospital; Kyoto Japan
8. Section of Clinical Epidemiology, Department of Community Medicine; Kyoto University Graduate School of Medicine; Kyoto Japan
9. Department of Healthcare Epidemiology; Kyoto University Graduate School ofMedicine/ School of Public Health; Kyoto Japan