1. Department of Orthopedic Surgery, Seoul Paik Hospital, University of Inje College of Medicine, Seoul, Korea.
2. Department of Biomedical Engineering, Inje University, Gimhae, Korea.
3. Trauma & Orthopaedics, Medway NHS Trust, Kent, UK.
4. Department of Orthopaedic Surgery, Konkuk University School of Medicine, Seoul, Korea.