1. Department of Rheumatology and Immunology; Peking University People's Hospital; Beijing China
2. Department of Rheumatology and Immunology; Peking Union Medical College Hospital; Beijing China
3. Department of Rheumatology and Immunology; China-Japan Friendship Hospital; Beijing China
4. Department of Rheumatology and Immunology; Shanghai Jiaotong University Renji Hospital; Shanghai China
5. Department of Rheumatology and Immunology; Xijing Hospital; the Fourth Military Medical University; Xian China
6. Department of Rheumatology and Immunology; Guangdong Provincial People's Hospital; Guangzhou China
7. Department of Rheumatology and Immunology; Beijing Hospital; Beijing China
8. Department of Rheumatology and Immunology; Shanghai Guanghua Hospital; Shanghai China
9. Department of Rheumatology and Immunology; Second Affiliated Hospital of Guangzhou Medical College; Guangzhou China
10. Department of Rheumatology and Immunology; Xinan Affiliated Hospital of the Third Military Medical University; Chongqing China
11. Department of Rheumatology and Immunology, the; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
12. Department of Rheumatology and Immunology; Second Affiliated Hospital of Zhejiang University; Hangzhou China
13. Department of Rheumatology and Immunology; Nanjing Drum Tower Hospital; the Affiliated Hospital of Nanjing University Medical School; Nanjing China
14. Department of Rheumatology and Immunology, the ; First Affiliated Hospital of Sun Yat-sen University; Guangzhou China
15. Department of Rheumatology and Immunology; Chinese PLA General Hospital; Beijing China
16. Department of Rheumatology and Immunology; Second Military Medical University; Shanghai China
17. Department of Rheumatology and Immunology; Changhai Hospital; the Second Military Medical University; Shanghai China
18. Department of Rheumatology and Immunology; Jiangsu Provincial People Hospital; Nanjing China
19. Department of Rheumatology and Immunology; Beijing Chaoyang Affiliated Hospital to Capital University of Medical Science; Beijing China