1. Geriatric Medicine, Division of Health Sciences, University of Edinburgh, Edinburgh, UK
2. Emergency Medicine, University of Sheffield, Sheffield, UK
3. Health and Social Care, Leeds Institute of Health Sciences, School of Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, UK
4. School of Health and Social Care, Edinburgh Napier University, Edinburgh, UK
5. Edinburgh Clinical Trials Unit, University of Edinburgh, Edinburgh, UK
6. Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Edinburgh, UK
7. Emergency Medicine Research Group (EMERGE), NHS Lothian, Edinburgh, UK
8. Norwich Medical School, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, UK
9. Bradford Institute for Health Research, Bradford Royal Infirmary, Bradford, UK
10. Psychiatry, University of York, York
11. Hull York Medical School, York, UK
12. Bradford District Care NHS Foundation Trust, Bradford, UK