1. Department of Molecular Medicine, University of Pavia , 27100 Pavia , Italy
2. De Gasperis Cardio Center, Interventional Cardiology Unit , Niguarda Hospital, 20162 Milan , Italy
3. Interventional Cardiology Unit, A.O.U. Policlinic “G.Martino”, University of Messina , 98124 Messina , Italy
4. Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, A.O.U. Policlinic “G. Martino― Messina University of Messina , 98122 Messina , Italy
5. Department of Cardiology, Jessa Hospital, Stadsomvaart 11, 3500 Hasselt, Belgium; Faculty of Medicine and Life Sciences, University of Hasselt , 3500 Hasselt , Belgium
6. Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico “G. Rodolico-San Marco”, University of Catania , 95123 Catania , Italy
7. Department of Cardiology, St Antonius Hospital, 3435 Nieuwegein, Netherlands and MUMC , 6229 Maastricht , The Nehterlands
8. Duke Clinical Research Institute, Duke University Medical Center , 27708 Durham, NC , USA
9. Cardiocentro Ticino Institute, Division of Cardiology, and Università della Svizzera italiana (USI) , 6900 Lugano , Switzerland