1. Department of Orthopaedic Surgery, School of Medicine, Kyungpook National University, Daegu, South Korea.
2. Department of Orthopaedic Surgery, Kyungpook National University Hospital, Daegu, South Korea.
3. Department of Microbiology, School of Medicine, Kyungpook National University, Daegu, South Korea.
4. Department of Orthopaedic Surgery, Gyeongsang National University Changwon Hospital, Changwon, South Korea.