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Memory B cells are negatively correlated with vitamin D levels in SLE patients. (A) Gating strategy for Figure 25(OH)D levels against circulating (B) naïve B cells (CD19+IgD+), (C) memory B cells (CD19+IgD-CD27+CD38-) and (D) plasmablasts (CD19+IgD-CD27+CD38+) displayed as percent of live cells. Each symbol represents an individual patient, n = 14. PB = plasmablast.
