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Mean (SD) baseline data for the 14 subjects
| Age (years) | 66 (7) |
| FEV1 (l) | 0.71 (0.3) |
| BMI (kg m−2) | 28 (6) |
| Cigarette consumption (pack years) | 53 (34) |
| Reversibility (ml) | 109 (57) |
| PaCO2 (kPa) | 7.9 (1.0) |
| PaO2 (kPa) | 7.2 (1.3) |
| Number of subjects taking respiratory medication | |
| Short-acting β2-adrenoceptor agonists | 13 |
| Long-acting β2-adrenoceptor agonists | 9 |
| Inhaled corticosteroids | 9 |
| Short-acting antimuscarinics | 9 |
| Long-acting antimuscarinic | 0 |
| Oral theophylline | 2 |
| Home oxygen | 8 |
