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. 2018 May 9;22:12. doi: 10.1186/s40824-018-0121-2

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© The Author(s). 2018

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. 4 — GAG contents and chondrogenic markers expression. a The GAG concentrations normalized to DNA content of each sample; b Chondrogenic gene expression of positive markers (aggrecan, Sox9, collagen type2) and negative marker (collagen type1) after 2 and 4 weeks of culture in chondrogenic medium. (*p < 0.05, ** p < 0.01, ***p < 0.001)