1. Department of Cardiology, Ospedali del Tigullio, Via don Bobbio, Lavagna, Italy
2. Department of Cardiology, Novosibirsk Research Institute, Novosibirsk, Russia
3. Department of Cardiology, Ospedale S. Paolo, Savona, Italy
4. Department of Cardiology, Ospedale Panico, Tricase, Italy
5. Department of Cardiology, Ospedale Maggiore, Crema, Italy
6. Department of Cardiology, Ospedale Maggiore della Carità, Novara, Italy
7. Department of Cardiology, Ospedale S. Maria Nuova, Reggio Emilia, Italy
8. Department of Cardiology, Policlinico Casilino, Roma, Italy
9. Department of Cardiology, Ospedale Careggi, Firenze, Italy
10. Department of Cardiology, Hospital Clinic, Barcelona, Spain