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. 2020 May 1;8(2):21. doi: 10.3390/medsci8020021

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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 pictures of adult rat ventricular cardiomyocytes. (A) Freshly isolated cardiomyocytes are shown; (B) cardiomyocytes after 48 h cultivation in the presence of fetal calf serum.