1. Department of Orthopaedics, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
2. Department of Orthopaedic Surgery, National Taiwan University Hospital, Taipei, Taiwan
3. School of Medicine, National Taiwan University, Taipei, Taiwan
4. Department of Pathology, National Taiwan University Hospital, Taipei, Taiwan
5. Department of Orthopaedic Surgery, Chiayi Christian Hospital, Chiayi, Taiwan