Serious adverse events
| Treatment, n=55 | Control, n=59 | |
| Exacerbations requiring hospitalisation | 9 | 5 |
| Pneumonia (respiratory tract infection with X-ray changes) | 4 | 1 |
| Pneumothorax | 8 | 1 |
| Deaths | 3 | 0 |
| Respiratory failure | 2 | 0 |
| COPD with cor pulmonale | 1 | 0 |
COPD, chronic obstructive pulmonary disease.