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Cardiac fibrosis induced by diabetes. Cardiac sections were stained with Sirius red (see the photomicrographs). The bar graphs depict the statistical analysis for fibrosis in the control (nondiabetic), diabetic, and diabetic + exercise (diabetes EX) rats. N = 5 hearts in each group. The scale bar indicates 50 μm. ∗∗p < 0.01 versus control.
