1. University College London Institute of Cardiovascular Science, London, United Kingdom
2. Queen Elizabeth University Hospital, Glasgow, United Kingdom
3. Department of Statistical Science, University College London, London, United Kingdom
4. Barts Heart Centre, St Bartholomew’s Hospital, Barts Health National Health Service Trust, West Smithfield, London, United Kingdom
5. Salisbury District Hospital, Salisbury, United Kingdom
6. University College London Institute of Neurology, London, United Kingdom
7. Royal Brompton Hospital, London, United Kingdom
8. St George’s Hospital, London, United Kingdom
9. University of East Anglia, Norwich Research Park, Norwich, United Kingdom