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Mean forced expiratory volume in 1 second (FEV1) (with 95% confidence interval) on day 0 predose and at 2-hours postdose thereafter during the core study (per-protocol set).
FP/FORM, fluticasone propionate/formoterol fumarate; FP/SAL, fluticasone propionate/salmeterol xinafoate. Core study: day 0 to day 84.
