1. Institute of Cardiology, ASST Spedali Civili di Brescia, Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, 25121 Brescia, Italy
2. Department of Cardiology, Division of Medicine, Akershus University Hospital, Lørenskog, 1478 Nordbyhagen, Norway
3. K.G. Jebsen Center for Cardiac Biomarkers, Institute of Clinical Medicine, University of Oslo, 0313 Oslo, Norway
4. Department of Internal Medicine II, Division of Cardiology, Center of Cardiovascular Medicine, Medical University of Vienna, 1090 Vienna, Austria
5. Cardiology Division, Massachusetts General Hospital, Harvard Medical School, and Baim Institute for Clinical Research, Boston, MA 02215, USA