Affiliation: | (1) Department of Pediatric Surgery, Osaka Medical Center for Maternal and Child Health and Research Institute, Izumi-city, Osaka, Japan, JP;(2) Department of Neonatology, Osaka Medical Center for Maternal and Child Health and Research Institute, Izumi-city, Osaka, Japan, JP;(3) Department of Obstetrics, Osaka Medical Center for Maternal and Child Health and Research Institute, Izumi-city, Osaka, Japan, JP;(4) Department of Pediatric Surgery, Osaka University Medical School, 2-2 Yamadaoka Suita, Osaka 565-0871, Japan, JP |