1. Arrhythmia Section, Hospital Clínic, Cardiovascular Clinic InstituteUniversity of Barcelona Barcelona Catalonia Spain
2. Centro de Investigación Biomédica en Red Enfermedades Cardiovasculares (CIBERCV) Madrid Spain
3. Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) Barcelona Catalonia Spain
4. Arrhythmia Section, Department of CardiologyHospital Universitari Doctor Josep Trueta Girona Catalonia Spain