1. Department of Gastroenterology and Hepatology; Tokyo Medical and Dental University; Tokyo Japan
2. Endoscopy and Medicine, Graduate School of Biomedical and Health Sciences; Hiroshima University; Hiroshima Japan
3. Department of Pathology; Graduate School Tokyo Medical and Dental University; Tokyo Japan
4. IBD Center; Sapporo Kosei General Hospital; Sapporo Japan
5. Department of Medicine, Division of Gastroenterology; Showa University School of Medicine; Tokyo Japan
6. Yokohama City University Medical Center; Yokohama Japan
7. Department of Inflammatory Bowel Disease, Division of Internal Medicine; Hyogo College of Medicine; Nishinomiya Japan
8. Tokyo Yamate Medical Center; Tokyo Japan
9. Tokyo Women's Medical University; Tokyo Japan
10. Toho University Medical Center Sakura Hospital; Shimoshizu Japan