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Lung pathology score in mice exposed to MWCNT for 7 days. Median ± interquartile range for all pathology scores on day 7 samples compared to the DM controls versus the MWCNT-exposed mice. Asterisks indicate significance at **p<0.01 compared to the DM controls by a non-parametric one sided Mann–Whitney test. n = 5 for the DM control and n = 6 for MWCNT treatment.
