Affiliation: | (1) Department of Orthopaedic Surgery, Korea University, College of Medicine, Anam Hospital, Seoul, Korea;(2) Department of Biostatistics, Korea University, College of Medicine, Seoul, Korea;(3) Department of Biomedical Engineering, School of Medicine, Chungbuk National University, Cheongju, Korea;(4) Department of Orthopedic Surgery, University of Ulsan, College of Medicine, Asan Medical Center, 388-1, Poongnap-2dong, Songpa-gu, Seoul, 138-736, Korea |