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. 2022 Apr 11;8(4):232. doi: 10.3390/gels8040232

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© 2022 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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Volume of tumor (mm³) at the end of experiment for each of the included studies. Dark gray area shows the tumor volume for specimens treated with non-pH-NPs. Light gray area shows the tumor volume for specimens treated with pH-NPs.