1. Cicely Saunders Institute of Palliative Care, Policy and Rehabilitation, and
2. Cicely Saunders Institute Patient and Public Involvement Group, King’s College London, London, United Kingdom
3. School of Health Sciences, University of East Anglia, Norwich, United Kingdom
4. Sussex Community NHS Foundation Trust, Brighton General Hospital, Brighton, United Kingdom
5. National Heart and Lung Institute, Imperial College, London, United Kingdom; and
6. Royal Brompton and Harefield NHS Foundation Trust, Harefield Pulmonary Rehabilitation and Muscle Research Laboratory, London, United Kingdom