1. Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China;
2. Department of Medical Administration, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China;
3. The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, Anhui, China;
4. Department of Rheumatism and Immunity, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China