1. Department of Pediatric Hepatology and GastroenterologySaiseikai Yokohama‐shi Tobu Hospital Yokohama Japan
2. Department of Hepatology and Gastroenterology for Growth and HealthToho University Graduate School of Medicine Tokyo Japan
3. Department of Anatomic PathologyKurashiki Central Hospital Kurashiki Japan
4. Department of GastroenterologyJapanese Red Cross Nagoya Daini Hospital Nagoya Japan
5. Department of PediatricsToho University Sakura Hospital Sakura Japan
6. Department of MedicineTeikyo University School of Medicine Tokyo Japan
7. Department of General MedicineHiroshima University Graduate School of Medical Science, Programs of Applied Medicine, Clinical Pharmacotherapy Hiroshima Japan