1. University Hospitals Bristol and Weston NHS Foundation Trust; Bristol UK
2. NIHR Bristol Biomedical Research Centre; University Hospitals Bristol NHS Foundation Trust and the University of Bristol; Bristol UK
3. Patient Advisory Group; British Heart Foundation; London UK
4. University of Bristol Population Health Sciences; University of Bristol; Bristol UK
5. MRC/CSO Social and Public Health Sciences Unit & Robertson Centre for Biostatistics, Institute of Health and Well Being; University of Glasgow; Glasgow UK
6. National Heart and Lung Institute; Imperial College London; London UK
7. South Tees Hospitals NHS Foundation Trust; Middlesbrough UK
8. Department of Cardiac Anaesthesia and Intensive Care; Bristol Heart Institute / University Hospitals Bristol NHS FT; Bristol UK
9. Department of Cardiovascular Sciences; University of Leicester; Leicester UK
10. Anaesthesia and Critical Care Research Unit; University Hospital Southampton NHS Foundation Trust; Southampton UK
11. Perioperative and Critical Care Research Theme, Southampton NIHR Biomedical Research Centre; University Hospital Southampton NHS Foundation Trust / University of Southampton; Southampton UK
12. Perioperative and Critical Care Research Theme, Southampton NIHR Biomedical Research Centre; University Hospital Southampton NHS Foundation Trust / University of Southampton; Southampton UK
13. Robertson Centre for Biostatistics, School of Health and Wellbeing; University of Glasgow; Glasgow UK
14. Bristol Medical School; University of Bristol; Bristol UK