1. Department of Orthopaedic Oncology and Surgery, Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
2. Department of Pathology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan
3. Department of Diagnostic Pathology, Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
4. Department of Pediatric Hematology and Oncology, Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
5. Department of Orthopaedic Surgery, Saitama Medical University Hospital, Moroyama, Saitama, Japan
6. Department of Orthopaedic Surgery, Saitama Medical University, Saitama Medical Center, Kawagoe, Saitama, Japan