1. Department of Rheumatology and Immunology, Peking University People's Hospital, Beijing, China.
2. Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China.
3. Institute of Analytical Chemistry and Synthetic and Functional Biomolecules Center, College of Chemistry and Molecular Engineering, Peking University, Beijing, China.
4. Peking-Tsinghua Center for Life Sciences, Beijing, China.