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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/).
The sample of cell culture micrograph. The mitochondria of the cells are colored green and allow one to determine the size of cells. Normal cell nuclei are colored blue. Nuclei of non-viable cells are stained in purple.