Scatter plot of the % change versus baseline in pulmonary function test results at a) 4 months and b) the end of the study versus the analyte concentration at baseline. Scatter plot of the % change versus baseline in pulmonary function test results at a) 4 months and b) the end of the study versus the analyte concentration at baseline. The regression line (grey line) and 95% confidence interval (grey area) are represented. FVC: forced vital capacity; MMP: matrix metalloproteinase. Yasmina Bauer et al. ERJ Open Res 2017;3:00074-2016 ©2017 by European Respiratory Society