1. Robertson Institute of Biostatistics and Clinical Trials Unit; University of Glasgow; Glasgow UK
2. Department of Cardiology; Bristol Heart Institute; Bristol UK
3. Department of Cardiology; Southmead Hospital; Bristol UK
4. Bristol Medical School, Faculty of Health Sciences; University of Bristol; Bristol UK
5. British Heart Foundation Centre of Research Excellence, Institute of Cardiovascular and Medical Sciences; University of Glasgow; Glasgow UK
6. Department of Cardiology; Royal Free Hospital, Royal Free London NHS Foundation Trust; London UK
7. NIHR Cardiovascular Research Institute; Glenfield Hospital; Leicester UK
8. Centre for Cardiology in the Young; The Heart Hospital, University College London Hospitals; London UK
9. Royal Brompton Hospital and National Heart and Lung Institute; Imperial College London; London UK
10. MRC/CSO Social and Public Health Sciences Unit & Robertson Centre for Biostatistics, Institute of Health and Well Being; University of Glasgow; Glasgow UK