1. Department of Pediatrics, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, Japan
2. Department of Pathology, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, Japan
3. Department of Pediatric Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, Japan