1. Department of Orthopaedic Surgery, MS Jaegeon Hospital, Daegu, Korea.
2. Department of Orthopaedic Surgery, Prime Hospital, Busan, Korea.
3. Department of Orthopaedic Surgery, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea.
4. Department of Orthopaedic Surgery, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
5. Department of Orthopaedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.