1. National Heart and Lung Institute, Imperial College London, London, England
2. Imperial Clinical Trials Unit, School of Public Health, Imperial College London, London, England
3. Institute for Lung Health, University of Leicester, Leicester, England
4. Institute of Infection Immunity and Inflammation, University of Glasgow, Glasgow, Scotland
5. Respiratory Medicine, NHS Greater Glasgow and Clyde, Glasgow, Scotland
6. Nottingham Respiratory Research Unit, University of Nottingham, Nottingham, England
7. Respiratory Medicine, Heart of England Foundation Trust, Birmingham, England
8. Severe and Brittle Asthma Unit, University of Birmingham, Birmingham, England
9. Respiratory Medicine and Allergy, King’s College London School of Medicine, London, England
10. Department of Asthma, Allergy and Respiratory Science, Guy’s and St. Thomas’ NHS Foundation Trust, London, England
11. Respiratory Medicine, Newcastle University, Newcastle, England
12. Respiratory Medicine, Imperial College Healthcare NHS Trust, London, England
13. Centre for Respiratory Medicine and Allergy, Medicines Evaluation Unit, University of Manchester and University Hospital of South Manchester NHS Foundation Trust, Manchester, England
14. Respiratory Medicine, Portsmouth Hospitals NHS Trust, Portsmouth, England