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DNA migration (mm) in the aortic tissue evaluated by Comet assay, 24 h after pulmonary administration of either saline or diesel exhaust particles (DEP; 20 μg/mouse) with or without carnosol pretreatment (20 mg/kg) given 1 h earlier. Data are means ± SEM (n = 5). Statistical analysis was by Holm–Sidak's multiple comparisons test.
