CXCR2 and acute myeloid leukemia: The production of these chemokines may also correlate with the expression of other chemokines, particularly CCL13, CCL24, CXCL5, and CXCL6 [31], indicating the involvement of CCR2 and CXCR2 ligands, as well as CCR4 ligands, in tumorigenic mechanisms in certain AML patients.