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. 2017 Aug 17;7:8639. doi: 10.1038/s41598-017-09379-8

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Homogeneous suspension of microspheres in gel matrix. This representative scanning electron microscope (SEM) image of pNIPAAm gel (blue, color added) containing embedded, drug-loaded PLGA microspheres (red, color added) shows that microsphere structure and morphology is maintained and that the microspheres are homogeneously suspended in the gel. Scale bar = 20 μm.