Affiliation: | 1. Department of Orthopaedic Surgery, Matsuda Hospital, 17-1 Sanezawa Aza Tatsutayashiki, Izumiku, Sendai, 981-3217, Japan;2. Department of Orthopaedic Surgery, Tohoku University School of Medicine, 1-1 Seiryomachi, Aobaku, Sendai, 980-8574, Japan |