We also observed a strong negative correlation between levels of CD8+ T cells and MDSCs (Supplementary Fig. S6a) and between CD8+ T cells and platelets in breast tumours (r = −0.14, P = 1.5 × 10−6 and r = −0.3, P = 3.33 × 10−24, respectively) and across cancer types. This evidence concerns the gene CD8A and breast neoplasm.