Institution: | 1. Xiamen University School of Medicine, Xiamen 361005; Department of Rheumatology and Immunology; First Hospital Affiliated to Xiamen University, Xiamen 3610032. Department of Rheumatology and Immunology; First Hospital Affiliated to Xiamen University, Xiamen 3610033. Department of Nephrology, First Hospital Affiliated to Xiamen University, Xiamen 361003; Fujian Province, China |