1. Cardiology Department, Complejo Hospital Universitario Santiago de Compostela, IDIS (Instituto para el Desarrollo e Integración de la Salud), CIBERCV (Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares), Santiago de Compostela, Spain
2. Electrophysiology Unit, Cardiology Service, Hospital Miguel Servet Zaragoza, Zaragoza, Spain
3. Cliniques universitaire Saint-Luc, Université de Louvain, Brussels
4. Electrophysiology Unit, Cardiology Service, University Hospital of Geneva, Geneva, Switzerland
5. Vrije Universiteit Brussel, Electrophysiology Unit, Brussels, Belgium
6. Electrophysiology Unit, Cardiology Service, Hospital Virgen de la Salud, Toledo, Spain
7. Electrophysiology Unit, Cardiology Service, Hospital Clinic Barcelona, Barcelona, Spain
8. Electrophysiology Unit, Cardiology Service, Hospital Puerta del Mar, Cádiz, Spain
9. Electrophysiology Unit, Cardiology Service, Hospital Universitario La Fe, Valencia, Spain
10. Electrophysiology Unit, Cardiology Service, Hospital Clínico Universitario de Valencia, Valencia, Spain
11. Electrophysiology Unit, Cardiology Service, Hospital Universitario Virgen Macarena, Sevilla, Spain
12. Electrophysiology Unit, Cardiology Service, Clínica Universidad de Navarra, Pamplona. Navarra, Spain
13. Coronary and Intensive Care Unit, University Hospital Son Espases, Palma de Mallorca, Spain
14. Electrophysiology Unit, Cardiology Service, Hospital Fundación Jiménez Díaz, Madrid, Spain
15. Electrophysiology Unit, Cardiology Service, Hospital Universitario Marqués de Valdecilla, Santander, Spain
16. Electrophysiology Unit, Cardiology Service, Hospital Universitario de Basurto, Bilbao, Spain
17. Electrophysiology Unit, Cardiology Service, Hospital Universitario La Paz, Madrid, Spain