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. 2018 Sep 20;9:1001. doi: 10.3389/fphar.2018.01001

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Copyright © 2018 Yu, Liu, Zhang, Ming and Wang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Effects of isoliquiritigenin on Nrf2 and HO-1 expression in lung tissues. The values presented are the means ± SEM of three independent experiments. #p < 0.01 vs. control group, ^∗∗p < 0.01 vs. cigarette smoke group.