2 Heart Institute, Hospital Universitari Germans Trias I Pujol, CIBERCV, Badalona, and the Universitat Autonoma Barcelona, Badalona, Spain.
3 Institute of Cardiology, ASST Spedali Civili di Brescia, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy.