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Immunophenotyping of fibroblasts and endothelial cells for PECAM-1 (CD31). A) fibroblasts of control group; B) fibroblasts in the presence of Aloe vera; C) endothelial cells of control group; D) endothelial cells in the presence of Aloe vera. Gray histograms indicate unstained cells and orange histograms show CD31-PE stained cells
