1. Arthroscopy and Joint Research Institute, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Orthopedic Surgery, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea.
3. Department of Orthopedic Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Orthopedic Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.