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(a) Fluorescence microscopy images showing HUVECs growing on different substrates for 10 days and stained with live (green) and dead (red) viability assay kit (scale bar = 500 µm), (b) cell viability (mean ± SD, n = 8, *p < 0.001 compared with other groups), and (c) phalloidin-labeled F-actin filament (red), DAPI nuclear staining (blue), and overlaid fluorescent image of immunostained cellular components for cells on the substrates at 1 day (scale bar = 50 µm).
