1. Department of Orthopaedic Surgery, Kyungpook National University Hospital, Kyungpook National University School of Medicine, Daegu, Korea.
2. Department of Orthopaedic Surgery, Daegu Park Hospital, Daegu, Korea.
3. Department of Orthopaedic Surgery, Fatmawati National General Hospital, Jarkarta, Indonesia.
4. Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.