1. Department of Pediatric Surgery Kyoto Prefectural University of Medicine KyotoJapan
2. Department of Pediatric Surgery Osaka Women's and Children's Hospital OsakaJapan
3. Department of Pediatrics Saitama Medical Center Saitama Medical University Saitama Japan
4. Department of Maternal–Fetal and Neonatal Medicine National Center for Child Health and Development TokyoJapan
5. Department of Pediatric Surgery Jichi Children's Medical Center Tochigi Jichi Medical University TochigiJapan
6. Division of Radiology National Center for Child Health and Development TokyoJapan
7. Department of Pediatric Surgery Osaka City General Hospital OsakaJapan
8. Department of Pediatric Surgery Graduate School of Medical Sciences Kyushu University FukuokaJapan
9. Department of Obstetrics and Gynecology Jikei University School of Medicine TokyoJapan
10. Department of Pediatrics Toyohashi Municipal Hospital Aichi Japan