1. Department of Cardiology, S. Chiara Hospital, 38122 Trento, Italy
2. Electrophysiology Unit, Cardio-Thoraco-Vascular Department, ASST Grande Ospedale Metropolitano Niguarda, 20162 Milan, Italy
3. Department of Thoracic Surgery, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, 10060 Turin, Italy
4. Cardiology Unit, Luigi Sacco University Hospital, 20157 Milan, Italy