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. 2014 Mar 4;9(3):e89894. doi: 10.1371/journal.pone.0089894

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© 2014 Chen 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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The level of TNF-α mRNA expression was analyzed using the 2^−ΔCT method and normalized to the Control group. The levels of statistical significance are as follows: **, p<0.01 relative to the Control group; ##, p<0.01 relative to the CCD group.