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. 2021 Feb 27;22(5):2364. doi: 10.3390/ijms22052364

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© 2021 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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Detection of CD68 positive cells by routine immunohistochemistry (IHC), CD68 immunopositive products—brown. Left: frontal gray (GM) and white (WM) matter of the unspecified encephalopathy (UEP) subject demonstrating brown reaction products in the activated microglia/macrophages (perivascular (thin arrows) and diffuse (thick arrows) location), (200×, 250×); right: temporal gray (GM) and white (WM) matter of the UEP subject demonstrating brown reaction products in the activated microglia/macrophages (perivascular (thin arrows) and diffuse (thick arrows) location), (250×, 250×).