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Metabolic activity of HUVECs after 5 days of incubation with releasates from droplet–hydrogel composites. Cells were incubated with releasates collected that day. Data are shown as mean ± standard deviation for n = 5. $p < 0.05 vs. sham control. Inset shows activity of HUVECs treated with known concentrations of bFGF.
