1. Department of Orthopedics, Qinghai Provincial People’s Hospital, Xining, Qinghai, PR China
2. Department of Dermatology, Xuzhou Municipal Hospital Affiliated with Xuzhou Medical University, Xuzhou, Jiangsu 221002, PR China
3. Department of Orthopedics, The Shanghai Tenth People’s Hospital of Tongji University, Shanghai, PR China
4. Department of Radiology, Beijing Jishuitan Hospital, Beijing 10035, PR China
5. Department of Rheumatology and Immunology, Xuzhou Municipal Hospital Affiliated with Xuzhou Medical University, Xuzhou, Jiangsu 221002, PR China