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. 2021 May 20;11(5):1355. doi: 10.3390/nano11051355

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© 2021 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 (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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In vitro cell viabilities of NCTC1469 and DU145 cells incubated with the PAA-coated Ln₂O₃ NPs [Ln = (a) Tb and (b) Ho]. (c) Optical images of DU145 cancer cells incubated with PAA-coated Tb₂O₃ NPs at various Tb-concentrations.