1. Pacing and Electrophysiology Unit, Cardiology DepartmentCentro Hospitalar e Universitário de CoimbraCoimbra Portugal
2. Cardiology DepartmentHospital da Luz ArrábidaVila Nova de Gaia Portugal
3. Cardiology DepartmentCentro Hospitalar Vila Nova de GaiaVila Nova de Gaia Portugal
4. Royal Papworth Hospital NHS Foundation TrustCambridge UK
5. Faculdade de Medicina da Universidade de CoimbraCoimbra Portugal