1. Department of Cardiac ElectrophysiologyBarts Heart Centre, St Bartholomew’s Hospital, Barts Health NHS TrustLondon UK
2. Department of CardiologyOxford Heart Centre, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation TrustOxford UK
3. Department of CardiologySt. Georges HospitalLondon UK
4. Department of CardiologySt Anthony’s HospitalSurrey UK