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. 2019 Sep 14;20(18):4561. doi: 10.3390/ijms20184561

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© 2019 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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Morphology of the human Wharton’s jelly umbilical cord-derived mesenchymal stem/stromal cells (hUC-MSCs) cultured on the GO and rGO surfaces after 24, 48, and 72 h of culture. Representative images are presented; magnification: 100×. The arrows indicate morphological changes of the hUC-MSCs. Legend: GO-sf-1: small flakes/thick layer; GO-sf-2: small flakes/thin layer; GO-lf-1: large flakes/thick layer; GO-lf-2: large flakes/thin layer; rGO-hr-1: high reduction level/thin layer; rGO-hr-2: high reduction level/thick layer; rGO-lr-1: low reduction level/thin layer; rGO-lr-2: low reduction level/thick layer; Control: tissue culture plastic surface (TCPS).