1. Division of Pediatrics , Kikugawa General Hospital , Shizuoka , Japan
2. Department of Pediatrics , Hamamatsu University School of Medicine , Shizuoka , Japan
3. Division of Pediatrics, Department of Homeostatic Regulation and Development , Niigata University Graduate School of Medical and Dental Sciences , Niigata , Japan
4. Japan Environment and Children’s Study Medical Support Center , National Research Institute for Child Health and Development , Tokyo , Japan
5. Department of Pediatrics , Osaka University Graduate School of Medicine , Osaka , Japan
6. Division of Pediatrics , Okinawa Chubu Hospital , Okinawa , Japan
7. Department of Pediatrics and Adolescent Medicine , Juntendo University Graduate School of Medicine , Tokyo , Japan
8. Department of Pediatrics, Faculty of Medicine , Oita University , Oita , Japan
9. Department of Pediatrics , Keio University School of Medicine , Tokyo , Japan
10. Department of Gastroenterology and Endocrinology , Osaka Women’s and Children’s Hospital , Osaka , Japan
11. Pediatric Chronic Intestinal Pseudo-Obstruction (CIPO), Research Group for “Comprehensive Study and Seamless Guidelines” on Rare and Intractable Gastrointestinal Disease from Childhood, Supported by the Ministry of Health, Labor and Welfare of Japan , Tokyo , Japan
12. Department of Pediatrics , Teikyo University Chiba Medical Center , 3426-3 Anesaki, Ichihara-shi , Chiba 299-0111 , Japan