1. Department of Orthopaedic Surgery, Seoul Red Cross Hospital, Seoul, Korea
2. Department of Orthopaedic Surgery, H Plus Yangji Hospital, Seoul, Korea
3. Department of Orthopaedic Surgery, Ajou University School of Medicine, Suwon, Korea
4. Department of Orthopaedic Surgery, Konkuk University School of Medicine, Seoul, Korea
5. Department of Orthopaedic Surgery, Sarang Plus Hospital, Seoul, Korea