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. 2011 Feb 17;6(2):e17236. doi: 10.1371/journal.pone.0017236

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Han 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) Saline treatment plus 0 µg/ml nano-SiO₂ exposure. (B) Saline treatment plus 40 µg/ml nano-SiO₂ exposure. (C) Saline treatment plus 80 µg/ml nano-SiO₂ exposure. (D) OVA treatment plus 0 µg/ml nano-SiO₂ exposure. (E) OVA treatment plus 40 µg/ml nano-SiO₂ exposure. (F) OVA treatment plus 80 µg/ml nano-SiO₂ exposure. ** p<0.01, compared with (A). # p<0.05, compared with (D). + p<0.05, ++ p<0.01, comparisons between the same exposure concentration groups.