1. Department of Cardiology, University Hospital of Rennes , 35000 Rue Henri Le Guilloux, Rennes , France
2. Cardiology, Department of Cardiac, Vascular, Thoracic Sciences and Public Health, University Hospital of Padua , 35121 Via Nicolò Giustiniani, Padua , Italy
3. Cardiovascular Institute, Hospital Clínic, Universitat de Barcelona , 08036 C. de Villarroel, Barcelona , Spain
4. Cleveland Clinic , 9500 Euclid Avenue, Cleveland, OH 44195 , USA
5. Fondazione Toscana G. Monasterio , 56124 Via Giuseppe Moruzzi, Pisa , Italy