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Expression of (A and B) VEGF, (C and D) VEGFR2, and (E and F) bFGF using immunohistochemical analysis (x200). (A, C and E) Control groups. (B, D and F) VPA-treated groups. VEGF, vascular endothelial growth factor; bFGF, basic fibroblast growth factor; VPA, valproic acid; VEGFR-2, VEGF receptor-2.
