1. Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China
2. Anhui Province Key Laboratory of Major Autoimmune Diseases, Hefei, Anhui, China
3. Department of General Surgery, Hefei, Anhui Province, China
4. Department of Rheumatology, Anhui Provincial Hospital, Hefei, China