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CD8+ tumour-infiltrating lymphocytes (TILs) in gliomas. Representative immunohistochemical images of CD8+ TILs in glioma ( × 400): (A) Grade II (B) Grade III (C) Grade IV. (D and E): The number of CD8+ TILs in different grades of glioma. Scale bars, 50 μm. *P<0.05.
