1. Social Science and Research Ethics Department, Africa Health Research Institute, KwaZulu-Natal, South Africa
2. Primary Care Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
3. School of Health Sciences, University of East Anglia, Norwich, UK
4. Department of Oncology, Royal Papworth Hospital NHS Foundation Trust, Cambridge, UK
5. Department of Oncology, University of Cambridge, UK
6. Respiratory Medicine, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
7. North West Anglia Hospitals NHS Foundation Trust, Cambridgeshire, UK
8. Primary Palliative Care Research Group, University of Edinburgh, Edinburgh, UK