1. Wythenshawe Hospital Manchester University NHS Foundation Trust Manchester UK
2. Department of Academic Cardiology Castle Hill Hospital University of Hull Hull UK
3. Hull York Medical School University of Hull University of York York UK
4. Robertson Institute of Biostatistics and Clinical Trials Unit University of Glasgow Glasgow UK
5. National Heart & Lung Institute and National Institute of Health Research Cardiovascular Biomedical Research Unit Imperial College Royal Brompton & Harefield Hospitals London UK