1. Department of Medicine for Older People, Southmead Hospital, North Bristol NHS Trust, Bristol, UK
2. Department of Biostatistics and Health Informatics, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
3. Palliative and End of Life Care Research Group, Population Health Sciences, Bristol Medical School, Bristol, UK
4. Vascular Surgery, Southmead Hospital, North Bristol NHS Trust, Bristol, UK
5. Cardiff Medical School, Cardiff, UK