1. St George's University Hospital, London, United Kingdom
2. 1st Department of Cardiology, Hippokration Hospital, University of Athens, Athens,, Greece
3. Barts Heart Centre, St Bartholomew’s Hospital, West Smithfield, EC1A 7BE, London, United Kingdom
4. Epsom and St Helier University Hospitals, London, United Kingdom
5. 1st Department of Cardiology, Hippokration Hospital, University of Athens, Athens, Greece
6. Department of Cardiovascular Imaging, King's College London, United Kingdom