1. Heart Rhythm Management Center, Postgraduate Course in Cardiac Electrophysiology and Pacing, Universitair ziekenhuis brussel-Vrije Universiteit Brussel, Laarbeeklaan 101, Brussels, Belgium
2. Cardiac Intensive Care and Electrophysiology Unit, IRCCS Policlinico San Matteo, Viale Camillo Golgi 19, Pavia, Italy
3. Cardiac Electrophysiology Unit, villa Maria Cecilia Hospital, via vecchia corriera 1, Barbiano, Ravenna, Italy
4. Electrophysiology and Pacing Unit, Istituto Città di Pavia, via Parco Vecchio 27, Pavia, Italia
5. Division of Cardiology, Cardiocentro Ticino, via tesserete 48, Lugano, Switzerland