1. Department of Orthopaedic Surgery; Ewha Womans University Mokdong Hospital; Seoul Korea
2. Department of Orthopaedic Surgery; Myongji Hospital; Kyungki Korea
3. Department of Orthopaedic Surgery; Seoul National University Bundang Hospital; Kyungki Korea
4. Biomedical Research Institute; Seoul National University Bundang Hospital; Kyungki Korea
5. Department of Orthopaedic Surgery; Konyang University Hospital; Daejon Korea
6. Department of Orthopaedic Surgery; Dongguk University Ilsan Hospital; Kyungki Korea
7. Department of Orthopaedic Surgery; Sungkyunkwan University Samsung Changwon Hospital; Gyeongnam Korea