1. Department of Orthopaedic Surgery, Inje University Haeundae Paik Hospital, Busan, Korea.
2. Department of Pathology, Inje University Haeundae Paik Hospital, Busan, Korea.
3. Department of Pediatrics, Inje University Haeundae Paik Hospital, Busan, Korea.
4. Department of Pediatric Surgery, Inje University Haeundae Paik Hospital, Busan, Korea.