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Active treatment vs. placebo (P) comparisons for (A) residual volume (RV), (B) functional residual capacity (FRC) and (C) inspiratory capacity (IC). Data for RV and IC forced expiratory volume in 1 s mean difference [95% confidence intervals (CI)], data for FRC are geometric mean ratio (one-sided 95% CIs shown). Tio vs P, (▪); S100 vs P (•); S50 vs P (▾)
