1. Department of Orthopedics, The First Hospital of Lanzhou University, Lanzhou 730000, China
2. Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
3. Department of Orthopedics, Guangzhou Huaxin Orthopedic Hospital, Guangzhou, China
4. Division of Rheumatology, Penn State Hershey College of Medicine, Hershey, PA, U.S.A.
5. First Clinical Medical College, Lanzhou University, Lanzhou, China