1. Edgcumbe Consulting , Bristol, UK
2. Department of Cardiothoracic Surgery, Sheffield Teaching Hospitals , Sheffield, UK
3. Department of Cardiothoracic Surgery, St Mary’s Hospital , London, UK
4. Department of Cardiothoracic Surgery, Essex Heart Centre , Basildon, UK
5. Department of Cardiothoracic Surgery, Kings College Hospital , London, UK
6. Department of Cardiothoracic Surgery, Royal Brompton and Harefield Hospitals , London, UK
7. Department of Cardiothoracic Surgery, Liverpool Heart and Chest hospital , Liverpool, UK
8. Department of Cardiothoracic Surgery, Royal Sussex County Hospital , Brighton, UK
9. Department of Cardiothoracic Surgery, Bristol Royal Infirmary , Bristol, UK
10. Department of Cardiothoracic Surgery, Royal Papworth Hospital , Cambridge, UK
11. Department of Cardiothoracic Surgery, Lancashire Cardiac Centre , Blackpool, UK