1. Department of Orthopaedic Surgery, Konkuk University Hospital, Konkuk University School of Medicine, Seoul, Korea.
2. Department of Orthopedic Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
3. Department of Orthopaedic Surgery, Dongguk University Ilsan Hospital, Goyang, Korea.
4. Department of Orthopaedic Surgery, Kyungpook National University Hospital, Daegu, Korea.
5. Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
6. Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.