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. 2014 Aug 1;9:68. doi: 10.1186/s13018-014-0068-5

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Copyright © 2014 Zhang et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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Effect of PTH on collagen expression in chondrogenic pellet culture for 3, 7, and 21 days. Relative mRNA levels of Col2a1 (A), Col10a1 (B), and Col1a1 (C) following PTH treatment are compared with expression in the control (0 nM PTH) (n = 8 for each dose). *P < 0.05 vs. control group (Steel's test).