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. 2012 Oct 22;4(4):1067–1105. doi: 10.3390/cancers4041067

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© 2012 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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Left: Cell viability estimated by MTT proliferation tests for different incubation concentrations of: (A) HeLa cells incubated with Folic Acid-UCNPs [65]; (B) KB cells cultured in the presence of citrate capped-NPs ([125], reproduced by permission of Elsevier).