1. Medical School St George's, University of London Cranmer Terrace UK
2. School of Medicine, Dentistry and Biomedical Sciences Queen's University Belfast Belfast UK
3. Faculty of Medicine Imperial College London London UK
4. Department of Epidemiology and Healthcare University College London London UK
5. Department of Cardiothoracic Surgery Liverpool Heart and Chest Hospital Liverpool UK
6. Liverpool Centre for Cardiovascular Science University of Liverpool and Liverpool Heart and Chest Hospital Liverpool UK
7. Department of Cardiac surgery Alder Hey NHS Foundation Trust Liverpool UK