Fig. 5From: Particle characterization and toxicity in C57BL/6 mice following instillation of five different diesel exhaust particles designed to differ in physicochemical propertiesSaa3 mRNA levels in lung tissue of mice day 1 (a), 28 (b) and 90 (c) post-exposure to 6, 18 and 54 μg DEP9.7, DEP13, DEP17, HVO13 and RME13. * = p < 0.05. ** = p < 0.01, *** = p < 0.001, **** = p < 0.0001Back to article page