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Expression of lymphocyte marker CD3 and angiogenesis marker CD31 at the defect site. (a) Immunofluorescence microscopy showing endothelial cell immunostaining for CD31 (red) and measurement and analysis of CD31-positive cells. (b) Immunofluorescence microscopy showing endothelial cell immunostaining for CD3 (red) and measurement and analysis of CD3-positive cells.
