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To assess wound neovascularization after administration of H5.020CMV.PDGF-β, we immunostained tissue biopsies for an endothelial specific antigen CD31 and quantified the number of positive staining vessels per HPF at (a) day 1, (b) day 3, and (c) day 28. Bar = low power: 500 µm, high power: 150 µm. CMV, cytomegalovirus; HPF, high power field; PDGF-β, platelet-derived growth factor-β.
