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. 2018 Apr 11;27(2):245–255. doi: 10.1177/0963689717745891

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© The Author(s) 2018

This article is distributed under the terms of the Creative Commons Attribution 4.0 License (http://www.creativecommons.org/licenses/by/4.0/) which permits any 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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Fig. 6. — The ratio of fine (type III) collagen fibers and thick (type I) collagen in native Achilles tendons and allografts, based on picrosirius Red staining. In the Allo group, the ratio of fine/thick collagen fibers is increased in the proximal section, compared with the distal portion (A). The ratio, however, is consistent in the proximal, middle, and distal sections in the native Achilles tendons and the Allo + mesenchymal stem cell (MSC) group. The ratio of fine/thick collagen fibers in the proximal sections is significantly different among the native Achilles tendons, the Allo group, and the Allo + MSC group (B). It is the greatest in the Allo group. For the middle section, the ratio is increased in the Allo group as compared with the native Achilles tendons. The ratio in the distal sections is not significantly different among the 3 groups. *P < 0.05.