Significantly increased staining of CD8+ T cells, CD4+ T cells, macrophages (F4/80), and NK cells (NKp46) in EMT6 MerTK C5 + dox tumor sections was observed compared to EMT6 Vector + dox and EMT6 MerTK C5 fed regular diet (Figures 3C, D). Here, CD4 is linked to neoplasm.