1. Department of Pediatrics Division of Medicine and Graduate School of Medicine Hokkaido University Sapporo Japan
2. Department of Pediatrics Sapporo Kosei General Hospital Sapporo Japan
3. Department of Surgical Pathology Sapporo Kosei General Hospital Sapporo Japan
4. IBD center Sapporo Higashi Tokushukai Hospital Sapporo Japan
5. Department of Applied Genomics Kazusa DNA Research Institute Kisarazu Japan
6. Department of Pediatrics Faculty of Medicine and Graduate School of Medicine Hokkaido University Sapporo Japan