TNFRSF13B and systemic lupus erythematosus: The expression of TACI (MFI) was decreased in active SLE patients compared with Non-Active patients in SWM B cells (1816 vs 2250, p = 0.0187), CXCR5+ CD11c- SWM B cells (1680 vs 2126, p = 0.0113), DN B cells (961 vs 1225, p = 0.0205) and DN1 B cells (938 vs 1122, p = 0.0252) (Figures 4H–K).