Response was defined as change from baseline. Study baseline FEV1 was defined as the mean of the -1 hour and -10 minute measurements performed in the morning of the first treatment visit for the first period, just prior to administration of the first morning dose of randomized treatment. Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate. FEV1 AUC 0-12h was calculated from 0-12 hours post-dose using the trapezoidal rule, divided by the observation time (12h) to report in litres.

Full analysis set (FAS). FAS is defined as all patients with baseline (pre-dose) data and any evaluable post-dosing data for either of the co-primary endpoints. FAS including all patients with evaluable data for this endpoint after six weeks.

Response was defined as change from baseline. Study baseline FEV1 was defined as the mean of the -1 hour and -10 minute measurements performed in the morning of the first treatment visit for the first period, just prior to administration of the first morning dose of randomized treatment. Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate. FEV1 AUC 12-24h was calculated from 12-24 hours post-dose using the trapezoidal rule, divided by the observation time (12h) to report in litres.

FAS including all patients with evaluable data for this endpoint after six weeks.

Response was defined as change from baseline. Study baseline FEV1 was defined as the mean of the available pre-dose FEV1 values prior to the first dose at the first randomized treatment visit for the first period. Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate. FEV1 AUC 0-24h was calculated from 0-24 hours post-dose using the trapezoidal rule, divided by the observation time (24h) to report in litres.

FAS including all patients with evaluable data for this endpoint after six weeks.

Response was defined as change from baseline. Study baseline FEV1 was defined as the mean of the available pre-dose FEV1 values prior to the first dose of the treatment at the first treatment visit for the first period. Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate. FEV1 AUC 0-3h was calculated from 0-3hours post-dose using the trapezoidal rule, divided by the observation time (3 h) to report in litres.

FAS including all patients with evaluable data for this endpoint after first dose of treatment.

Response was defined as change from baseline. Study baseline FEV1 was defined as the mean of the available pre-dose FEV1 values prior to the first dose of treatment for the first period. Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate. FEV1 AUC 0-3h was calculated from 0-3hours post-dose using the trapezoidal rule, divided by the observation time (3 h) to report in litres.

FAS including all patients with evaluable data for this endpoint after six weeks.

Response was defined as change from baseline. Study baseline peak FEV1 was defined as the mean of the available pre-dose peak FEV1 values prior to first dose of treatment for the first period. Peak FEV1 (0-3h) values were obtained within 0 - 3 hours after the first dose of treatment. Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate.

FAS including all patients with evaluable data for this endpoint after first dose of treatment.

Response was defined as change from baseline. Study baseline peak FEV1 was defined as the mean of the available pre-dose peak FEV1 values prior to first dose of treatment for the first period. Peak FEV1 (0-3h) values were obtained within 0 - 3 hours after the last dose after six weeks of treatment. Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate.

FAS including all patients with evaluable data for this endpoint after six weeks.

Response was defined as change from baseline. Study baseline trough FEV1 was defined as the mean of the available pre-dose trough FEV1 values prior to first dose of treatment for the first period. Trough values were the mean of values obtained 23h and 23 h 50 min after the last dose of study drug after six weeks of treatment . Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate.

FAS including all patients with evaluable data for this endpoint after six weeks.

Response was defined as change from baseline. Study baseline FVC was defined as the mean of the available pre-dose FVC values prior to first dose of treatment for the first period. Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate. FVC AUC 0-12h was calculated using the trapezoidal rule, divided by the observation time to report in litres.

FAS including all patients with evaluable data for this endpoint after six weeks.

Response was defined as change from baseline. Study baseline FVC was defined as the mean of the available pre-dose FVC values prior to first dose of treatment for the first period. Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate. FVC AUC 12-24h was calculated using the trapezoidal rule, divided by the observation time to report in litres.

FAS including all patients with evaluable data for this endpoint after six weeks.

Response was defined as change from baseline. Study baseline FVC was defined as the mean of the available pre-dose FVC values prior to first dose of treatment for the first period. Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate. FVC AUC 0-24h was calculated using the trapezoidal rule, divided by the observation time to report in litres.

FAS including all patients with evaluable data for this endpoint after six weeks.

Response was defined as change from baseline. Study baseline FVC was defined as the mean of the available pre-dose FVC values prior to the first dose of treatment for the first period. Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate. FVC AUC 0-3h was calculated using the trapezoidal rule, divided by the observation time to report in litres.

FAS including all patients with evaluable data for this endpoint after first dose of treatment.

Response was defined as change from baseline. Study baseline FVC was defined as the mean of the available pre-dose FVC values prior to the first dose of treatment for the first period. Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate. FVC AUC 0-3h was calculated using the trapezoidal rule, divided by the observation time to report in litres.

FAS including all patients with evaluable data for this endpoint after six weeks.

Response was defined as change from baseline. Study baseline peak FVC was defined as the mean of the available pre-dose peak FVC values prior to first dose of treatment for the first period. Peak FVC (0-3h) was obtained within 0 - 3 hours after the last am dose of study drug after 6 weeks of treatment. Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate.

FAS including all patients with evaluable data for this endpoint after six weeks.

Response was defined as change from baseline. Study baseline trough FVC was defined as the mean of the available pre-dose trough FVC values prior to first dose of treatment for the first period. Trough values were the mean of obtained 23 h and 23 h 50 min after the last dose of study drug after six weeks of treatment . Means are adjusted using a mixed effects model with treatment and period as fixed effects and patient as a random effect and study baseline as a continuous covariate.

FAS including all patients with evaluable data for this endpoint after six weeks.

Clinical relevant Abnormalities for Vital Signs, Blood Chemistry, Haematology, Urinalysis and ECG. New abnormal findings or worsenings of baseline conditions were reported as Adverse Events related to treatment (cardiac disorders and investigations).

Treated set.