1. Department of Orthopaedics, St. Vincent's Hospital, The Catholic University of Korea, Suwon, Korea.
2. Department of Orthopaedic Surgery, School of Medicine, Ewha Womans University, Seoul, Korea.
3. Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.
4. Department of Orthopedic Surgery, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Korea.
5. Department of Orthopaedic Surgery, Soonchunhyang University Hospital, Seoul, Korea.
6. Department of Orthopaedic Surgery, Keimyung University School of Medicine, Daegu, Korea.
7. Department of Orthopaedic surgery, Yonsei University, College of Medicine, Seoul, Korea.
8. Department of Orthopaedic Surgery, School of Medicine, Hanyang University, Seoul, Korea.
9. Department of Orthopaedic surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
10. Department of Orthopedic Surgery, Korea University Anam Hospital, Seoul, Korea.