CD19 and Decreased total leukocyte count: Splenic leukocyte counts and proportions remained stable (Supplemental Table S1, Supplemental Figure S1), whilst in the blood, there was some evidence for transient leukopenia specific to Ly6G+ neutrophils, CD11b+ monocytes and CD3+ T-cells (Supplemental Table S1, Figure 9), but not CD19+ B-cells.