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Cell viability. A549 cells were exposed to increasing doses (0, 0.1, 1, 10, and 100 μg/ml) of wMPs for 24 and 48 h. After the exposure, cell viability was assessed by MTT test. Control cells (unexposed) are considered 100% viable. Data represent the mean ± SE of three independent experiments (n = 3). *Statistically different respect to the control, p < 0.05; one‐way ANOVA + Bonferroni's post hoc test
