1. Istituto Cardiocentro Ticino, Ente Ospedaliero Cantonale, 6900 Lugano, Canton Ticino, Switzerland
2. Istituto Cardiocentro Ticino, Ente Ospedaliero Cantonale, 6500 Bellinzona, Canton Ticino, Switzerland
3. Cardiology and Cardiovascular Intensive Care Unit, ARNAS “G. Brotzu”, 09047 Cagliari, Italy
4. Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy
5. Arrhythmias and Electrophysiology Unit, Division of Cardiology, IRCCS Fondazione Policlinico S. Matteo, 27100 Pavia, Italy