Flow cytometry analysis of various immune cells in tumor tissues after treatments, including Gr-1highCD11b+ granulocytic (G-MDSC) (A) and Gr-1intCD11b+ monocytic (M-MDSC) MDSC subsets (B), tumor infiltrating CD4+ T cells (C), CD8+ T cells(D), IFN+CD4+ T cells (E), IFN-γ+ CD8+ T cells (F) and granzyme B+ CD8+ T cells (G) in 4T1.2 tumor bearing mice. *p<0.05.