1. Department of Internal Medicine, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona, Badalona, Spain
2. Department of Radiology, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona, Badalona, Spain
3. Department of Internal Medicine and Emergency Room, Ospedale Buon Consiglio Fatebenefratelli, Naples, Italy
4. Department of Medical Clinic, Municipal Hospital of Dresden Friedrichstadt, Dresden, Germany
5. Department of Internal Medicine, Hospital Universitario 12 de Octubre, Madrid, Spain
6. Department of Internal Medicine, Hospital Municipal de Badalona, Barcelona, Spain
7. Department of Emergency Internal Medicine, Ospedale St. John, Rome, Italy
8. Department of Internal Medicine, Hospital del Tajo, Madrid, Spain
9. University Cardiology Clinic, Faculty of Medicine, Skopje, Republic of Macedonia