Affiliation: | 1. Department of Orthopaedic Surgery, Kobe Kaisei Hospital, 3-11-15, Shinohara-Kita, Nada, Kobe, 657-0068, Japan 2. Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki, Chuo, Kobe, 650-0017, Japan 3. Department of Orthopaedic Surgery, Chibune General Hosipital, 2-2-45, Tsukuda, Nishi-yodogawa, Osaka, 555-0001, Japan
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