1. Department of Cardiology, Barts Heart Centre, St Bartholomew's HospitalBarts Health NHS Trust London United Kingdom
2. Dipartimento di CardiologiaOspdale Generale Regionale F. Miulli Bari Italy
3. Department of CardiologyNa Homolce Hospital Prague Czech Republic
4. Cardiac Arrhythmia Research CentreCentro Cardiologico Monzino Milan Italy
5. Texas Cardiac Arrhythmia Institute, St. David's Medical CenterTexas Cardiac Arrhythmia Institute Austin Texas
6. Cardiac Arrythmia UnitMassachusetts General Hospital Boston Massachusetts
7. Department of Arrhythmia Services, Helmsley Electrophysiology CentreIcahn School of Medicine at Mount Sinai New York New York