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Figure 6: PRP treatment increases proliferation of epidermis basal cells and hair follicular bulge cells. (a) and (b): representative microphotographs of Ki67+ proliferating cells by immunohistochemistry of hair skin epidermis at baseline (a) and after PRP treatment (b). (c): morphometric analysis of Ki67+ cells of hair skin epidermis at baseline and after PRP treatment. (d) and (e): representative microphotographs of Ki67+ proliferating cells by immunohistochemistry of hair follicles at baseline (d) and after PRP treatment (e). (f): morphometric analysis of the percentage of Ki67+ nuclei in hair follicles at baseline and after PRP treatment. (g) and (h): representative microphotographs of CD31+ small dermal vessels of hair skin at baseline (g) and after PRP treatment (h). (i): morphometric analysis of CD31+ small dermal vessels of hair skin at baseline and after PRP treatment; * indicates . Original magnification: (a) and (b): 200x and (d), (e), (g), and (h): 100x.