1. Department of Orthopedics, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.
2. Department of Orthopedics, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, China.
3. Department of Rheumatology and Immunology, Xi'an No.5 Hospital, Xi'an, China.
4. Department of Prevention and Health Care, Xi'an Jiaotong University Hospital, Xi'an, China.