Affiliation: | 1. Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan;2. Department of Orthopaedic Surgery, Tohoku Kosai Hospital, Sendai, Japan;3. Department of Pathology, Tohoku University Hospital, Sendai, Japan;4. Department of Diagnostic Radiology, Tohoku University Hospital, Sendai, Japan |