1. Institute of Cardiology; University of Bologna and Azienda Ospedaliera S. Orsola-Malpighi; Via Massarenti 9 40138 Bologna Italy
2. IRCCS Istituto Clinico Humanitas; Rozzano Italy
3. Fondazione Policlinico S. Matteo IRCCS; Pavia Italy
4. Niguarda Ca’ Granda Hospital; Milano Italy
5. S. Maria della Misericordia Hospital; Udine Italy
6. Mater Salutis Hospital; Legnago Italy
7. Villa S. Anna Hospital; Catanzaro Italy
8. San Maurizio Regional Hospital; Bolzano Italy
9. Medtronic Italia SpA; Rome Italy
10. San Filippo Neri Hospital; Rome Italy