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. 2020 Oct 28;48(10):0300060520962946. doi: 10.1177/0300060520962946

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© The Author(s) 2020

Creative Commons Non Commercial CC BY-NC: This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 5. — Effects of treatments on expression levels of proliferating cell nuclear antigen (PCNA) in a mouse model of photoaging. Concentrated growth factor treatment increased the expression levels of PCNA. (a) Immunohistochemistry (×400); (b) PCNA-positivity rate; (c) proliferation index score. P value in b compared with respective model group; P value in c compared with photoaging group.

NC, normal control; CGF, concentrated growth factor; PSR, plasma skin regeneration system irradiation; PI, proliferation index.