Affiliation: | a Department of Surgery, Saitama Medical Center, Saitama Medical School, Saitama 350-8550, Japan b Department of Pediatric Surgery, Saitama Medical School, Saitama 350-0495, Japan c Division of Maternal and Fetal Medicine, Center for Maternal, Fetal and Neonatal Medicine, Saitama Medical Center, Saitama 350-8550, Japan d Division of Neonatal Medicine, Center for Maternal, Fetal and Neonatal Medicine, Saitama Medical Center, Saitama 350-8550, Japan |