1. Department of Rheumatism and Immunology, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000,
P.R.China
2. Department of Immunology and Rheumatology, Xingtai Peoples’ Hospital, Xingtai, Hebei 054001, P.R. China
3. Department of Rheumatism and Immunology, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R.China