TLR9 and B-cell chronic lymphocytic leukemia: There was no difference in the expression of TLR9 in peripheral blood as well as in bone marrow in IGHV MUT CLL patients mutated compared to IGHV UM (0.4345 vs. 0.367, p = 0.2104; median expression 0.3375 vs. 0.353, p = 0.6380, respectively).