The chemokines encoded by the genes that we did find to be correlated with CXCR4 expression are ligands for nine chemokine receptors found on many types of leukocytes, including neutrophils, monocytes/macrophages, dendritic cells, T cells, B cells, NK cells, and innate lymphoid cells - and have been reported to have a range of activities in cancers [38]. This evidence concerns the gene CXCR4 and cancer.