1. Department of Orthopaedic Surgery, Sheikh Khalifa Specialty Hospital, Ras al Khaimah, United Arab Emirates
2. Department of Orthopaedic Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
3. Department of Orthopaedic Surgery, Korea University Anam Hospital, Seoul, Korea
4. Department of Orthopaedic Surgery, National Police Hospital, Seoul, Korea
5. Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea