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A: MUC5B expression in IPF (n = 203) and unaffected subjects (n = 139) stratified by MUC5B promoter variant (rs35705950) genotype. MUC5B is produced in the bronchiolo-alveolar epithelia (B) and honeycomb cysts (C) of patients with IPF. [Adapted from Seibold et al. (178).]
