1. Department of Oral Oncology, Oral and Maxillofacial Surgery, Ichikawa General Hospital, Tokyo Dental College, Ichikawa‑shi, Chiba 272‑8513, Japan
2. Department of Pathology and Laboratory Medicine, Ichikawa General Hospital, Tokyo Dental College, Ichikawa‑shi, Chiba 272‑8513, Japan
3. Department of Musculoskeletal Oncology and Orthopaedic Surgery, Tochigi Cancer Center, Utsunomiya, Tochigi 320‑0834, Japan
4. Department of Orthopaedic Surgery, Tokyo Dental College, Ichikawa‑shi, Chiba 272‑8513, Japan
5. Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305‑8565, Japan