1. Harefield Respiratory Research Group and
2. National Heart and Lung Institute and
3. Medical Statistics, Research & Development, Royal Brompton and Harefield National Health Service (NHS) Foundation Trust, London, United Kingdom
4. Hillingdon Integrated Respiratory Service, the Hillingdon Hospitals NHS Foundation Trust, London, United Kingdom
5. Cicely Saunders Institute of Palliative Care, Policy, and Rehabilitation, King’s College London, London, United Kingdom; and
6. School of Health Sciences, University of East Anglia, Norwich, United Kingdom
7. National Institute for Health Research Collaboration for Leadership in Applied Health Research and Care Northwest London, Imperial College, London, United Kingdom