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Association of CC16 mRNA expression levels in bronchial epithelial cells with (A and B) baseline FEV1% predicted and (C and D) asthma exacerbations in the SARP (Severe Asthma Research Program) cross-sectional and longitudinal cohorts. CC16 mRNA expression levels have been logarithm base 2 (log2)- and natural logarithm (ln)-transformed in the (A and C) SARP cross-sectional cohort and (B and D) longitudinal cohort, respectively. Pre-BD = prebronchodilator.
