Effect of CCR1 and CCR5 deficiency on infiltration of immune cells into glioblastoma and survival of tumor bearing mice. A) Numbers of intra-glioblastoma CD11b+, CD4+, and CD8+ in CCR1 (left, black) and CCR5 (right, black)-deficient mice, compared to WT (white) mice. B) Kaplan-Meier survival plots of glioblastoma bearing CCR1 (left, square) and CCR5 (right, square)-deficient mice, compared to WT (circles) mice. The numbers of animals that were used in each group are indicated.