1. Department of Medicine and Clinical Science; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
2. Department of Gastroenterology; Osaka City University; Graduate School of Medicine; Osaka Japan
3. Molecular Gastroenterology and Hepatology; Kyoto Prefectural University of Medicine; Kyoto Japan
4. Department of Gastroenterology and Hepatology; Graduate School of Medicine; Kyoto University; Kyoto Japan
5. Division of Gastroenterology and Hepatology; Department of Internal Medicine; Keio University School of Medicine; Tokyo Japan
6. Division of Lower Gastroenterology; Department of Internal Medicine; Hyogo College of Medicine; Nishinomiya Hyogo Japan
7. Second Department of Internal Medicine; Osaka Medical College; Takatsuki Japan
8. Department of Gastroenterology; Nagoya University Graduate School of Medicine; Nagoya Japan
9. Division of Gastroenterology; Sapporo Kosei General Hospital; Sapporo Japan
10. Department of Gastroenterology; School of Medicine; Tokyo Medical and Dental University; Tokyo Japan