 ([S0](#pone.0000000.s000){ref-type="supplementary-material"}--[S0](#pone.0000000.s000){ref-type="supplementary-material"} Figs).  ![Correlations between rate of change in native lung volume/total lung volume ratio and change in forced expiratory volume in 0 second %predicted.\ There was a significant negative correlation between rate of change in native lung volume/total lung volume (N/T) ratio and 