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. 2013 May 6;121(6):676–682. doi: 10.1289/ehp.1205693

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Stimulation of neutrophilic inflammation in the lungs of rats by O-MWCNT (A), P-MWCNT (B), or F-MWCNT (C) evaluated in three labs (RL1, RL2, and RL3). Values are the mean ± SE percentage of neutrophils in BALF of rats 1 day after treatment with DM only (control) or MWCNTs (10, 50, or 200 µg/250 µL). *p < 0.05 compared with controls.