1 Department of Rheumatology and Immunology, Zhuzhou Hospital Affiliated to Xiangya Medical College, Central South University, Zhuzhou.
2 Department of Nephrology, Xiangya Second Hospital, Central South University, Changsha, Hunan, China.
3 Department of Rheumatology and Immunology, Zhuzhou Hospital Affiliated to Xiangya Medical College, Central South University, Zhuzhou; wgzncsu@csu.edu.cn.