Affiliation: | 1. Department of Pediatric Surgery, Keio University School of Medicine, , Tokyo, Japan;2. Department of Radiology, Keio University School of Medicine, , Tokyo, Japan;3. Department of Surgery, National Center for Child Health and Development, , Tokyo, Japan;4. Department of Pediatric Surgery, International University of Health & Welfare, , Tochigi, Japan;5. Department of Pediatric Surgery, Graduate School of Medicine, Kagoshima University, , Kagoshima, Japan |