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Il1b, Tumor necrosis factor (TNF) and Il6 mRNA expression in the nasal mucosa was quantified by quantitative real-time polymerase chain reaction (qPCR) in saline (ST) or CSS-treated mice and calculated relative to the expression of the endogenous control gene Rps3. Data represent means ± SEM (n = 6). *P < 0.05; **P < 0.01; ***P < 0.001; ****P < 0.0001 (one-way ANOVA).
