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Decreased ULBP3 expression in influenza-infected NECs from smokers. Differentiated NECs from smokers and nonsmokers were infected with Influenza A and analyzed for ULBP3 expression by flow cytometry 24 h postinfection. Data of percentage of cells staining positively for ULBP3 are expressed as fold change of infected over the respective noninfected control for each subject (n = 6 for smokers and n = 7 for nonsmokers); *P < 0.05.
