Department of Orthopedic Surgery, Sungae Hospital, Kwan Dong University College of Medicine, Seoul, Korea.
Address reprint request to Young-Kyun Woo, MD, PhD. Department of Orthopedic Surgery, Sungae Hospital, Kwan Dong University College of Medicine, 53gil 22 Yeouidaebang-ro, Yeongdeungpo-gu Seoul 150-960, Seoul, Korea. TEL: +82-2-8407-114, FAX: +82-2-8407-755, wooyk@catholic.ac.kr
Received 2 November 2013 Revised 12 December 2013 Accepted 12 December 2013
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