CD4 and neoplasm: In F4/80lowLy6Clow macrophage co-injected tumor, the F4/80lowLy6Clow macrophage proportion was higher (Fig. 2d) and the proportions of tumor-infiltrating CD3+ (Fig. 2e) and CD4+ T cells (Fig. 2f) were lower, compared to those in F4/80highLy6Clow macrophage co-injected tumor.