CXCR4 and glioblastoma: Overall, CCR5 and CXCR4 show the most prominent expression on CD8+ T-cell subsets in glioblastoma tissues, with CCR2, CXCR3 and CXCR6 displaying subset-specific glioblastoma enrichment in Tcm, Tem, and Tcm and Temra populations respectively.