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. 2015 Dec 30;6:260. doi: 10.1186/s13287-015-0263-2

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© Reppel et al. 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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 Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 5 — Matrix synthesis detected after 28 days of chondrogenic induction. Proteoglycans and total collagen were stained by Alcian blue and Sirius red (a), respectively. To explore the synthesis of various collagens in depth, immunofluorescence (b) and immunohistochemistry staining (c) were performed and detected using fluorescence microscopy and light microscopy, respectively; scale bar = 100 μm. BM-MSC bone marrow-derived mesenchymal stromal/stem cells, WJ-MSC Wharton’s jelly-derived mesenchymal stromal/stem cells