1. Department of Orthopedic Surgery, Seoul National University Hospital, Seoul, Korea.
2. Department of Orthopaedic Surgery, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, Korea.
3. Department of Hand and Microsurgery, Tianjin Hospital, Tianjin, China.
4. Department of Orthopedic Surgery, Seoul National University College of Medicine, Seoul, Korea.