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. 2020 Sep 15;8:570490. doi: 10.3389/fbioe.2020.570490

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Copyright © 2020 Peng, Lai, Chu, Hsieh, Tseng, Chiu and Lin.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Fourier transform infrared analyses of PLGA, FU, HA, PG, and FHP–c–PLGA NPs. (B) Scanning electron microscopy (SEM) or transmission electron microscopy (TEM) micrographs of the different NP preparations.