1. Department of Surgery, School of Medicine, National Yang-Ming University, Taipei, Taiwan;
2. Department of Orthopaedics & Traumatology, Taipei Veterans General Hospital, Taipei, Taiwan;
3. Department of Orthopaedics, Chiayi Christian Hospital, Chiayi, Taiwan;
4. Chung Hwa University of Medical Technology, Tainan, Taiwan;
5. Taipei City Hospital-ZhongXiao Branch, Taipei, Taiwan