1. Department of Orthopaedic Surgery, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Seoul, South Korea
2. Department of Orthopedic Surgery, College of Medicine, Jeju National University, Jeju, South Korea
3. Department of Orthopaedic Surgery, Medical Research Institute, Pusan National University Hospital, Seo-gu, Busan, South Korea
4. Departments of Orthopedic Surgery, Wonkwang University Hospital, Wonkwang University School of Medicine, Jeollabuk-do, South Korea