1. National Heart and Lung Institute Imperial College London London UK
2. Royal Brompton and Harefield Hospitals Guy's and St Thomas' NHS Foundation Trust London UK
3. Anglia Ruskin University Chelmsford UK
4. Essex Cardiothoracic Centre Basildon UK
5. MRC London Institute of Medical Sciences Imperial College London London UK
6. Department of Women and Children's Health King's College London London UK
7. British Heart Foundation Centre of Research Excellence School of Cardiovascular Medicine and Sciences, King's College London London UK
8. Department of Medical Statistics London School of Hygiene and Tropical Medicine London UK