Affiliation: | 1. Department of Orthopaedic Surgery, KonKuk University Medical Center, KonKuk University School of Medicine, 120-1, Neungdong-ro, Gwang-jin-gu, Seoul, 143-729, South Korea 2. Department of Orthopaedic Surgery, Veterans Health Service Medical Center, 53, Jinhwangdo-ro, Gangdong-gu, Seoul, 134-791, South Korea
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