1. British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care University of Cambridge Cambridge UK
2. National Heart and Lung Institute, Imperial College London London UK
3. Medical Research Council Laboratory of Medical Sciences Imperial College London London UK
4. Department of Women and Children's Health King's College London London UK
5. Royal Brompton & Harefield Hospitals, Guy's and St Thomas' NHS Foundation Trust London UK
6. British Heart Foundation Centre of Research Excellence School of Cardiovascular and Metabolic Medicine and Sciences, King's College London London UK