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. 2014 Nov 12;9(11):e112284. doi: 10.1371/journal.pone.0112284

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© 2014 Zhao 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 NO contents of the cell supernatant and synovial fluid were measured by a nitrate reductase assay. The data are shown as the mean ±S.D. a, b and c show the NO contents in the cell supernatant from each group compared with p<0.05; d, e, f and g show the NO contents of the synovial fluid from the rabbit knees of each group compared with p<0.05.