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. 2013 Feb 13;8(2):e55899. doi: 10.1371/journal.pone.0055899

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© 2013 Wang 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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(A) The changes in phosphorylation of Smad2 and Smad3. (B, C) Determination of grey value of pSmad2/Smad2 and pSmad3/Smad3. Results were shown as mean±SD of gray value. * means P<0.05 and ** means P<0.01 between two groups.