1. Department of Orthopaedic Surgery, Kyungpook National University Hospital, Daegu, Korea.
2. Department of Orthopaedic Surgery, Sky Hospital, Seoul, Korea.
3. Joint Reconstruction Center, Seoul National University Bundang Hospital, Seongnam, Korea.
4. Department of Statistics, Korea University, Seoul, Korea.
5. Department of Radiology, Seoul National University Hospital, Seoul, Korea.
6. Department of Radiology, Kyungpook National University Hospital, Daegu, Korea.