1. Barts Heart Centre Barts Health National Health Service Trust London United Kingdom
2. Imperial College Healthcare National Health Service Foundation Trust Hammersmith Hospital London United Kingdom
3. St. George’s Healthcare National Health Service Foundation Trust St. George’s Hospital London United Kingdom
4. Kings College Hospital King’s College Hospital National Health Service Foundation Trust London United Kingdom
5. Royal Brompton & Harefield National Health Service Foundation Trust Harefield Hospital Uxbridge United Kingdom
6. Royal Free London National Health Service Foundation Trust London United Kingdom
7. St Thomas’ National Health Service Foundation Trust Guys & St. Thomas Hospital London United Kingdom