1. Cardiovascular Department, University of Trieste, Cattinara Hospital, via Valdoni 7, Trieste, Italy
2. Department of Medical Sciences, Biostatistics Unit, University of Trieste, Cattinara Hospital, Strada Fiume 447, Trieste, Italy
3. Cardiovascular Department, Division of Cardiac Surgery, Cattinara Hospital, via Valdoni 7, Trieste, Italy
4. Cardiovascular Center, ASUITS, Maggiore Hospital, via Scipio Slataper, 9, Trieste, Italy
5. Department of Cardiology, Maastricht University Medical Center, P. Debyelaan 25, HX Maastricht, the Netherlands
6. Department of Cardiology, Zuyderland Medical Center, H. Dunantstraat 5, PC Heerlen, the Netherlands