1. Department of Orthopaedic Surgery, Chonnam National University Hwasun Hospital, Chonnam National University Medical School, Jeonnam 519-809, Republic of Korea
2. Center for Joint Disease, Chonnam National University Hwasun Hospital, 322 Seoyong-ro, Hwasun-eup, Hwasun-gun, Jeonnam 519-809, Republic of Korea