1. Department of Orthopaedic Surgery, Kyungpook National University Hospital, Daegu, Korea.
2. Department of Orthopaedic Surgery, Daegu Park Hospital, Daegu, Korea.
3. Korea Institute of Science and Technology, Seoul, Korea.
4. University of Science and Technology, Daejeon, Korea.
5. Department of Orthopaedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
6. Department of Orthopaedic Surgery, Kyemyung University Dongsan Medical Center, Daegu, Korea.