We found a positive correlation not only between E2F8 and PD-L1/CTLA4 expression (Cor = 0.394) but also between E2F8 and CD8A/CD4 expression (Cor = 0.2) in basal-like breast cancer (Figure 4D), while MYBL2 had no significant correlations with ICI expression in basal-like breast cancer (Supplementary Figures S4D, E, S6B). Here, CTLA4 is linked to breast cancer.