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. 2014 Mar 11;9(3):e91317. doi: 10.1371/journal.pone.0091317

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© 2014 Gou et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Osteocalcin (OCN), bone morphogenetic protein 2 (BMP2), bone morphogenetic protein 7 (BMP7), Type I collagen (Col I) and Runt-related transcription factor 2 (RUNX2). *P<0.05 compared with control group. AOD, average optical density.