1. Department of Nephrology, The Second Hospital of Tianjin Medical University, Hexi, Tianjin 300201, P.R. China
2. Department of Infectious Diseases and Immunology, The Second Hospital of Tianjin Medical University, Hexi, Tianjin 300201, P.R. China
3. Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Hexi, Tianjin 300201, P.R. China