1. University Cardiology Unit, Interdisciplinary Department of Medicine, “Aldo Moro” University School of Medicine, Polyclinic University Hospital, Piazza Giulio Cesare 11, Bari 70124, Italy
2. Division of University Heart Surgery, Cardiothoracic Department, Polyclinic University Hospital, Piazza Giulio Cesare 11, Bari 70124, Italy