1. Department of Cardiology; Academic Medical Center; Amsterdam The Netherlands
2. Department of Cardiology; Maastricht University Medical Center; The Netherlands
3. Department of Internal Medicine, Centro Hospitalar de S. João; University of Porto Medical School; Porto Portugal
4. Department of Medical and Surgical Specialties; Radiological Sciences and Public Health; University of Brescia Italy
5. Department of Cardiology; Hospital Universitari Germans Trias i Pujol; Barcelona Spain
6. Department of Internal Medicine and Emergency; Careggi University Hospital; Florence Italy
7. Department of Cardiology; Azienda Istituti Ospitalieri di Cremona; Cremona Italy