1. Department of Orthopaedic Surgery, School of Medicine, Gyeongsang National University Hospital, Jinju, Korea.
2. Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, Seoul, Korea.
3. Department of Rehabilitation, Seoul National University Bundang Hospital, Seongnam, Korea.
4. Department of Anesthesiology, Chung-Ang University College of Medicine, Seoul, Korea.
5. Department of Orthopaedic Surgery, Inje University College of Medicine, Seoul, Korea.