1. Department of Community-Based Medical Education; Nagoya City University Graduate School of Medical Sciences; Nagano
2. Department of Gastroenterology and Metabolism; Nagoya City University Graduate School of Medical Sciences; Nagano
3. Center for Health, Safety and Environmental Management; Shinshu University; Matsumoto
4. Internal Medicine; Tokyo Metropolitan Komagome Hospital; Tokyo
5. Division of Gastroenterology; Tohoku University Graduate School of Medicine; Sendai
6. The Third Department of Internal Medicine; Kansai Medical University; Hirakata
7. Department of Gastroenterology, Graduate School of Medicine; The University of Tokyo; Tokyo
8. Department of Gastroenterology; Tokyo Women's Medical University Yachiyo Medical Center; Tokyo
9. Medical Informatics Division and Internal Medicine, Gastroenterology; Shinshu University Hospital; Matsumoto
10. Department of Pathology; Kurashiki Central Hospital; Kurashiki Japan
11. Department of Gastroenterology; Nagano Municipal Hospital; Nagano
12. Department of Gastroenterology; Shinshu University School of Medicine; Matsumoto
13. Department of Gastroenterology; Kurashiki Central Hospital; Kurashiki Japan