1. ASST Spedali Civili di Brescia and Department of Medical and Surgical Specialties, Radiological Sciences and Public Health University of Brescia Brescia Italy
2. Department of Cardiology, Herlev and Gentofte Hospital, and the Department of Biomedical Sciences, Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark
3. Division of Cardiology, Department of Medical Biotechnologies University of Siena Siena Italy
4. Brigham and Women's Hospital and Harvard Medical School Boston MA USA