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. 2014 Jan 21;9(1):e86166. doi: 10.1371/journal.pone.0086166

Figure 5. Cigarette smoke exposure suppressed the production of cytokines and chemokines of H9N2 infected mice.

Figure 5

The mice were exposed to room air or cigarette smoke for 21 days and then infected with H9N2 virus. The lungs were collected on day 5, 9 and 14 after H9N2 infection. A) The production of cytokines. B) The production of chemokines. Results represent mean ± SEM of 4–7 mice per group. # p<0.05, ## p<0.01; ### p<0.001 were tested by ANOVA of four groups; *p<0.05; **p<0.01; ***p<0.001 were determined by Tukey post hoc test.