1. Department of Cardiology; University Hospital “San Giovanni di Dio e Ruggi d'Aragona”; Salerno
2. Department of Cardiology; dell'Angelo Hospital; Mestre
3. Department of Cardiology; Istituto Di Ricovero e Cura a Carattere Scientifico; Fondazione Policlinico San Matteo; University of Pavia School of Medicine; Pavia
4. Department of Cardiology; Ospedale Fatebenefratelli; Benevento
5. Department of Cardiology Ospedale S. Maria degli Angeli; Pordenone
6. Department of Cardiology; Ospedale Civile; Potenza
7. Department of Cardiology; Ospedale S. Maria; Terni
8. Department of Cardiology; Ospedale di Rete per Acuti; Udine; Italy
9. Michigan State University; Lansing; Michigan
10. Duke Clinical Research Institute; Durham; North Carolina
11. Department of Cardiac Surgery; Istituto Di Ricovero e Cura a Carattere Scientifico; Policlinico San Donato Milanese; Milan; Italy