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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/).
Typical photomicrographs of cell scratching of HFB-4 melanocytes at 48 h (scale bar is 500 µm). The black bars indicate the distances of the wound closure. All experiments were performed three times.