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. 2019 Dec 27;9:20000. doi: 10.1038/s41598-019-56591-9

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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MSCs are more resistant to UV-B irradiation than dermal fibroblasts. (a) Clonogenic survival assays for human MSCs and HS68 dermal fibroblasts. (b) Relative proliferation at 96 hours after UV-B treatment of MSCs and dermal fibroblasts. (c) MTS assays showing metabolic viability at 96 hours after UV-B irradiation using doses up to 1500 mJ/cm². *P < 0.05, **P < 0.01, ***P < 0.001. Two-sided Student’s t-tests at 200 mJ/cm² (clonogenicity and proliferation assays) and 1500 mJ/cm² (viability assays) were used. Mean ± standard deviation is shown, n = 3.