Affiliation: | 1. Department of Orthopaedic Surgery, Tohoku University School of Medicine, 1-1 Seiryo-machi, Aobaku, Sendai, 980-8574, Japan 2. Department of Orthopaedic Surgery, Sendai Medical Center, Sendai, Japan 3. Department of Orthopaedic Surgery, Kesennuma City Hospital, Kesennuma, Japan 4. Department of Physical Medicine and Rehabilitation, Tohoku University School of Medicine, Sendai, Japan 5. Department of Orthopaedic Surgery, Tohoku Rosai Hospital, Sendai, Japan 6. Department of Orthopaedic Surgery, Japan Red Cross Sendai Hospital, Sendai, Japan 7. Department of Orthopaedic Surgery, Sendai City Hospital, Sendai, Japan
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