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. 2016 Jul 20;17:301. doi: 10.1186/s12891-016-1130-8

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© The Author(s). 2016

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. 6 — GAG content of the constructs and GAG content normalized to the cell number. a GAG content of the constructs in Groups A, B, and C after 3 weeks of in vitro culture. b GAG content normalized to the cell number. The * indicates significance (p < 0.05). The ^ indicates a significant difference between the gradient construct in Group A and the gradient construct in Group B, the homogeneous construct in Group B, and the gradient construct in Group C (p < 0.05). The # indicates a significant difference between Group A and Groups B and C (p < 0.05). The error bars show the SD (n = 3)