1. Department of Rheumatology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education , Beijing , China
2. Department of Rheumatology, The Fourth People’s Hospital of Shenzhen Affiliated to Guangdong Medical College , Shenzhen , China
3. Department of Rheumatology , Beijing Children Hospital Affiliated to Capital Medical University , Beijing , China
4. Department of Rheumatology, The Affiliated Hospital of Bengbu Medical College , Bengbu , China
5. Department of Rheumatology, The First Affiliated Hospital of USTC, Anhui Provincial Hospital , Hefei , China
6. Department of Rheumatology, The People’s Hospital of Xinjiang Autonomous Region , Urumqi , China
7. Department of Rheumatology , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
8. Department of Rheumatology, Xiangya Hospital , Central South University , Changsha , China
9. Department of Clinical Immunology, PLA Specialized Research Institute of Rheumatology and Immunology, Xijing Hospital , Airforce Military Medical University , Xi’an , China
10. Department of Rheumatology , Beijing Tongren Hospital Affiliated to Capital Medical University , Beijing , China
11. Department of Rheumatology, China-Japan Friendship Hospital Affiliated to the National Health Commission of PRC , Beijing , China
12. Department of Rheumatology , The First Affiliated Hospital of Nanjing Medical University , Nanjing , China
13. Department of Rheumatology , The First Affiliated Hospital of Shantou University Medical College , Shantou , China
14. Department of Rheumatology , Sino-Japanese friendship Hospital of Jilin University , Changchun , China
15. Department of Epidemiology and Bio-statistics , Institute of Basic Medical Sciences, China Academy of Medical Sciences and Peking Union Medical College , Beijing , China