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In vitro angiogenesis assay of HUVECs cultured for 24 h on a Matrigel layer under the influence of hH-EVs derived from cardiac regions. Representative images and analysis of the number of meshes formed after 6 h (A), 12 h (B) and 24 h (C). * p < 0.05 vs Control; ** p < 0.01 vs Control; *** p < 0.001 vs Control, 4× magnification.
