1. Department of Orthopaedic Surgery, Keimyung University Hospital, Daegu, Korea.
2. Department of Orthopaedic Surgery, Hanyang University Hospital, Seoul, Korea.
3. Department of Orthopaedic Surgery, Gwangju Veterans Hospital, Gwangju, Korea
4. Department of Orthopaedic Surgery, Center for Joint Disease, Chonnam National University Hwasun Hospital, Hwasun, Korea.
5. Department of Orthopaedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
6. Department of Orthopaedic Surgery, Soonchunhyang University Hospital, Seoul, Korea.
7. Department of Orthopaedic Surgery, Seoul Medical Center, Seoul, Korea.
8. Department of Orthopaedic Surgery, Inha University Hospital, Incheon, Korea.