1. Division of Cardiology; S. Giovanni Evangelista Hospital; Tivoli Italy
2. ANMCO Research Center; Firenze Italy
3. Department of Internal Medicine and Medical Specialties; Sapienza University of Rome; Roma Italy
4. Division of Cardiology; Istituti Clinici Scientifici Maugeri, IRCCS; Novara Italy
5. Division of Cardiology; S. Filippo Neri Hospital; Rome Italy
6. Division of Cardiology; S. Giuseppe e Melorio Hospital; S. Maria Capua Vetere Italy
7. Division of Cardiology; V. Fazzi Hospital; Lecce Italy
8. Division of Cardiology; R. Guzzardi Hospital; Vittoria, Ragusa Italy
9. Cardiology; Azienda Sanitaria Universitaria Integrata di Trieste; Trieste Italy
10. Division of Cardiology; Garibaldi-Nesima Hospital; Catania Italy