Fig. 2

Representative pictures of each TIL subset by immunohistochemical staining (× 400). Tissue sections were immunostained with anti-CD4 (a), anti-CD8 (b), anti-FOXP3 (c), anti-PD-1 (d), anti-CTLA4 (e), anti-ICOS (f), anti-GITR (g), anti-HLA-DR (h) or anti-Granzyme B (i) monoclonal antibody