1. Department of Rheumatology; National Center of Gerontology; Beijing Hospital; Beijing China
2. Department of Rheumatology; Peking Union Medical College Hospital; Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education; Beijing China
3. Department of Rheumatology; The Fourth People's Hospital of Shenzhen Affiliated to Guangdong; Medical College; Guangdong China
4. Department of Rheumatology; Beijing Children's Hospital Affiliated to Capital Medical University; Beijing China
5. Department of Rheumatology; The Second Hospital of Shanxi Medical University; Shanxi China
6. Department of Clinical Immunology and Rheumatology; Xijing Hospital affiliated to the Fourth Military Medical University; Shanxi China
7. Department of Rheumatology; Beijing Tongren Hospital Affiliated to Capital Medical University; Beijing China
8. Department of Rheumatology; Beijing Chao-Yang Hospital Affiliated to Capital Medical University; Beijing China
9. Department of Rheumatology; Anhui Provincial Hospital; Anhui China
10. Department of Rheumatology; Jiangsu Provincial People's Hospital; Jiangsu China