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. 2014 Oct 16;15(1):120. doi: 10.1186/s12931-014-0120-3

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© Li et al.; licensee BioMed Central Ltd. 2014

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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SPA , SPC , and TTF1 mRNA expression in lung tissues. SPA, SPC, and TTF1 mRNA expression levels in lung tissues were determined using quantitative real-time PCR. The relative expression of SPA, SPC, and TTF1 mRNAs was calculated using the 2^−ΔΔCt method. Values are presented as average expression levels of the mRNAs (means ± SEM, n = 12); *P < 0.05 versus group I, **P < 0.05 versus group II, ^# P < 0.05 versus group III.