1 Department of Rheumatology and Immunology and Beijing Key Laboratory for Rheumatism and Immune Diagnosis (BZ0135), Peking University People's Hospital, Beijing, China.
2 Department of Rheumatology and Immunology, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
3 Department of Rheumatology and Immunology, Peking University Shenzhen Hospital, Guangdong, China.