1. Department of Orthopedic Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, South Korea
2. Department of Orthopedic Surgery, Ajou University Hospital, Ajou University School of Medicine, Suwon, Gyeonggi-do, Republic of Korea
3. Department of Orthopedic Surgery, Inha University Hospital, Incheon, Republic of Korea
4. Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA