1. Department of Orthopaedic Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
2. Department of Orthopaedic Surgery, The Second Hospital of Jilin University, Changchun, China.
3. Department of Orthopedic Surgery, The Armed Forces Daejeon Hospital, Daejeon, Korea.
4. Gachon Medical Research Institute, Gil Medical Center, Gachon University, Incheon, Korea.