1. Department of Cardiology, King's College Hospital NHS Foundation Trust London UK
2. Department of Cardiology, St George's University Hospital NHS Foundation Trust London UK
3. Department of Cardiology, University Hospitals Bristol NHS Foundation Trust London UK
4. Department of Cardiology, Cardiff and Vale NHS Foundation Trust Wales UK
5. Department of Cardiology, Belfast Health and Social Care Trust Belfast UK
6. Department of Cardiology, Golden Jubilee National Hospital Glasgow UK