Fig. 2From: Enhancement of sciatic nerve regeneration with dual delivery of vascular endothelial growth factor and nerve growth factor genesIn vitro cell cytotoxicity of PDAPEI polyplexes at 10, 20, 30, 40, 50 and 60 w/w ratios after a 4 h; b 24 h. ***Indicates p < 0.005; data are mean ± SD (n = 6)Back to article page