1. Cardiology Division, Spedali Civili Hospital and University of Brescia, Italy
2. Cardiology Division, Parma University Hospital, Italy
3. Cardiology Division, University of Verona, Italy
4. Department of Public Health and Clinical Medicine, Umea University, Sweden
5. St George University, London, UK
6. Brunel University, London, UK
7. Heart and Vascular Institute, Einstein Medical Center, Philadelphia, USA