1. Department of Orthopedic Surgery and Sports Medical Center, and Sports Medical Research Institute, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea.
2. Department of Orthopedic Surgery and Sports Medical Center, KonKuk University Medical Center, Seoul, Korea.
3. Department of Orthopedic Surgery, Kyung Hee University Hospital, Seoul, Korea.
4. Department of Orthopedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
5. Department of Orthopedic Surgery, Chonnam National University Hospital, Gwangju, Korea.
6. Department of Orthopedic Surgery, Korea University Guro Hospital, Seoul, Korea.
7. Department of Orthopedic Surgery, Korea University Anam Hospital, Seoul, Korea.