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. 2011 Feb 23;12(2):1371–1388. doi: 10.3390/ijms12021371

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© 2011 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 8. — Cytotoxicity of various concentrations of PLA-PEG-PLL NPs/DNA complexes in HepG2 and HeLa cells. PLA-PEG-PLL NPs/DNA concentrations were from 50 μg/mL to 500 μg/mL (n = 3, *P < 0.05 compared with PEI).