1. Department of Cardiovascular Sciences; European Hospital; Rome Italy
2. Department of Cardiology; Ca' Foncello Hospital; Treviso Italy
3. Division of Cardiology; Ospedale A. Manzoni; Lecco Italy
4. ANMCO Research Center; Florence Italy
5. Division of Cardiology; Ospedale San Antonio Abate; Tolmezzo Italy
6. Department of Cardiology; Maggiore Hospital; Bologna Italy
7. Division of Cardiology; Azienda Ospedaliera-Universitaria; S. Martino Genova Italy
8. Department of Cardiovascular Diseases; S. Giovanni-Addolorata Hospital; Rome Italy
9. Division of Cardiology; Fondazione IRCCS Policlinico San Matteo; Pavia Italy
10. Cardiology Division; Campo di Marte Hospital; Lucca Italy
11. Division of Cardiology; Garibaldi-Nesima Hospital; Catania Italy