1. Department of Pediatrics and Child Health Kurume University School of Medicine Kurume Japan
2. Division of Gastroenterology National Center for Child Health and Development Tokyo Japan
3. Department of Pediatrics Juntendo University Faculty of Medicine Tokyo Japan
4. Division of Gastroenterology and Hepatology Saitama Children's Medical Center Saitama Japan
5. Department of Pediatrics Osaka Medical and Pharmaceutical University Takatsuki Japan
6. Department of Infection and Immunology Aichi Children's Health and Medical Center Ohfu Japan
7. Department of Pediatrics, Faculty of Medicine Saga University Saga Japan
8. Department of Pediatrics Nagasaki University Graduate School of Biomedical Sciences Nagasaki Japan
9. Department of Pediatric Hepatology and Gastroenterology Saiseikai Yokohamashi Tobu Hospital Yokohama Japan
10. Department of Pediatrics Sapporo Kosei General Hospital Sapporo Japan
11. Department of Gastroenterology and Endocrinology Osaka Women's and Children's Hospital Osaka Japan
12. Division of Gastroenterology, Department of Medicine Kurume University School of Medicine Kurume Japan
13. Inflammatory Bowel Disease Center, Department of Gastroenterology St. Mary's Hospital Kurume Japan