Affiliation: | 1. Department of Orthopaedic Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-ku, Tokyo 160-8582, Japan;2. Department of Orthopaedic Surgery, National Defence Medical College, Namiki 3-2, Tokorozawa-shi, Saitama 359-8513, Japan;3. Department of Diagnostic Radiology, Keio University School of Medicine, Shinanomachi 35, Shinjuku-ku, Tokyo 160-8582, Japan |