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. 2022 Jan 19;14(2):224. doi: 10.3390/pharmaceutics14020224

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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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Chemical structure of the copolymer poly(lactic)-co-(glycolic) acid (PLGA), which is widely used in drug-delivery applications. X represents the number of units of lactic acid and Y represents the number of units of glycolic acid.