1. Department of Healthcare Epidemiology; School of Public Health in the Graduate School of Medicine, Kyoto University; Kyoto Japan
2. Department of Healthcare Epidemiology; Department of Community Medicine, Graduate School of Medicine, Kyoto University; Kyoto Japan
3. Division of Gastroenterology and Hepatology, Department of Internal Medicine; Toho University Sakura Medical Center; Chiba Japan
4. Center for Advanced IBD Research and Treatment; Kitasato University Kitasato Institute Hospital; Tokyo Japan
5. Department of Gastroenterology and Hepatology; Osaka University Graduate School of Medicine; Suita Japan
6. Department of Gastroenterology and Hepatology; Kyoto University Hospital; Kyoto Japan
7. Department of Respiratory Medicine; Hyogo Prefectural Amagasaki General Medical Center; Hyogo Japan
8. Department of Health Promotion and Human Behavior; Kyoto University School of Public Health; Kyoto Japan