1. Department of Orthopedic Surgery, Kwangju Christian Hospital, Gwangju, Korea.
2. Department of Orthopedic Surgery, Ewha Womans University School of Medicine, Seoul, Korea.
3. Department of Orthopedic Surgery, Dong-A University College of Medicine, Busan, Korea.
4. Department of Orthopaedic Surgery, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea.
5. Department of Orthopedic Surgery, Inha University School of Medicine, Incheon, Korea.
6. Department of Orthopedic Surgery, Seoul National University College of Medicine, Seoul, Korea.
7. Department of Clinical Research, Janssen Korea, Seoul, Korea.
8. Department of Orthopaedic Surgery, Soonchunhyang University College of Medicine, Seoul, Korea.