1 Department of Rheumatology and Immunology, Anhui Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China.
2 Department of Rheumatology and Immunology, Anhui Provincial Hospital, Hefei, 230001, Anhui, China.
3 Department of Rheumatology and Immunology, Anhui Provincial Hospital, Hefei, 230001, Anhui, China. lixiaomei@ustc.edu.cn.