CXCR5 and B-cell chronic lymphocytic leukemia: Strikingly, the DF showed the highest expression of both CCR7 and CXCR5 in both U‐CLL and M‐CLL patients across all fractions assessed (Figure 4C,D) although no difference was observed in bulk levels between U‐CLL and M‐CLL (Supporting Information S1: Figure 5a,b).