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Immunohistochemical analysis of related protein expression. (A) VEGF and CD31 expression in each group. The black square indicates magnified area. The black arrow indicates positive staining blood vessels. Scale bar = 200 μm. Relative quantification for (B) expression of VEGF and (C) CD31. Data are represented as mean ± SD (n = 3; *P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001).
