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. 2011 Jan 6;6(1):e15700. doi: 10.1371/journal.pone.0015700

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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Bacteria isolated from smoke naïve patients were subjected to daily sham or smoke exposure (5 cigarettes/3 h) and then subjected to the biofilm detection assay. Data is represented as the ratio of smoke exposure to sham exposure. *, #, and $ indicate significant differences (p<0.05) between day 1 and 2, day 1 and 3, and day 1 and 4, respectively. Indicate the number of replicates.