Institution: | 1. Department of Surgery, Seoul National University College of Medicine, , Seoul, Korea;2. Department of Pathology, Seoul National University College of Medicine, , Seoul, Korea;3. Department of Pediatrics, Seoul National University College of Medicine, , Seoul, Korea;4. Cancer Research Institute, Seoul National University College of Medicine, , Seoul, Korea;5. Department of Pediatrics, Dongguk University Ilsan Hospital, , Goyang, Korea |