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Immunohistochemical analysis in the peri-infarct areas of chronic heart failure rats. a Representative micrographs of von Willebrand factor (vWF, red) immunostaining. Scale bar: 50 µm. b Quantitative analysis of capillary density (CST, n = 5, 40 fields; CDT, n = 5, 40 fields, each point is the mean value of 8 fields per animal). Values are means ± SEM. *P < 0.05 in CDT vs. CST using a non-parametric Mann–Whitney U-test
