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Comparison of the gradient and uniform CS/PCL in the cardiac tissue regeneration [29]. (A) Heparinization of the uniform CS/PCL (uCS/PCL) and gradient (gCS/PCL); (B) Cumulative release of VEGF from heparinized-uniform CS/PCL (Hep-uCS/PCL) and heparinized-gradient CS/PCL (Hep-gCS/PCL). Values represent mean ±SD (n = 5). “*” indicate statistically significant differences compared to heparinized groups (p < 0.05).
