1. Department of Pathology, Saitama Medical University International Medical Center, Saitama
2. Department of Orthopedic Surgery, Interdisciplinary Graduate School of Medicine, University of Yamanashi, Yamanashi
3. Department of Pathology, Saitama Medical Center, Saitama Medical University, Saitama
4. Department of Radiology, Interdisciplinary Graduate School of Medicine, University of Yamanashi, Yamanashi
5. Department of Orthopaedic Oncology & Surgery, Saitama Medical University International Medical Center, Saitama, Japan.