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MMP11 (A) and TIMP2 (B) immunostaining at the tumor center and MMP9 (C) and MMP14 (D) at the invasive front (×200 magnification), indicating the different cell types. Tumor cells (★), lymphocytes (<$>\raster(70%)="rg2"<$>) and macrophages (<$>\raster(70%)="rg1"<$>).
