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. 2020 Mar 26;12(4):736. doi: 10.3390/polym12040736

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© 2020 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 (http://creativecommons.org/licenses/by/4.0/).

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Representative knee joint explant from a C57BL/6 mouse that was injected with 5 μL of a 100 mg/mL suspension of particles with hydrophobic green dye IR780 (PBSe-GSK3787-IR) particles. Upon resection of the limbs, images were taken with a stereoscope to determine injectability and localization of particles. Images taken 7 days post injection of (A) Knee joint at 7.3× magnification; (B) Knee joint at 1.6× magnification; (C) Particles as visualized in the joint under fluorescence microscopy, 1.6× magnification.