1. Department of Cardiology; Salvatore Maugeri Foundation; Pavia Italy
2. Department of Internal Medicine; SS. Giovanni e Paolo Hospital; Venice Italy
3. Department of Internal Medicine; Loreto Mare Hospital; Naples Italy
4. Department of Cardiology; Maggiore Hospital; Trieste Italy
5. Department of Cardiology; Piemonte Hospital; Messina Italy
6. Department of Internal Medicine; Leonardi-Riboli Hospital; Lavagna Genoa Italy
7. Italian Association of Hospital Cardiologists (ANMCO) Research Center, Via La Marmora; 34-50121 Firenze Italy
8. Department of Internal Medicine; Ospedale Generale Provinciale; Bolzano Italy