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. 2020 Feb 22;25(4):989. doi: 10.3390/molecules25040989

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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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Histopathological structures of skins. (A) Image of H&E stained skin tissue. The dorsal skin tissues of hairless mice were fixed in 4% formaldehyde and stained with H&E solution. Histological changes were observed at 200× magnification under a microscope. (B) Epidermal and dermal thickness. H&E stained slides were prepared for three to five mice per group and epidermal thicknesses were assayed in duplicate for each mouse. Data are reported as the means ± SD. * p < 0.05 compared to the No group. # p < 0.05 compared to the UV + No group. Abbreviations: LoCPO, low amount CPO; HiCPO, high amount CPO.