Institute of Clinical Physiology, CNR, Pisa,Italy;Salerno Hospital, Italy;Monaldi Hospital, Napoli, Italy;University of Pisa, Italy;San Luca Hospital, Lucca, Italy;Careggi University Hospital, Florence, Italy;Federico II University;San Carlo Public Hospital, Potenza, Italy;Royal Brompton & Harefield NHS Foundation Trust;Ospedale dell'Angelo, Venezia-Mestre;University of Parma;Hospital Clinics, Trieste, Italy;Federal University of Rio Grande do Sul;Hospital San José, Criciuma, Brasil;Hospital San Vicente de Paulo, Passo Fundo, Brasil;University of Belgrade;University of Szeged, Hungary;Elisabeth Hospital, Hodmezovasarhely, Hungary;Sandro Pertini Hospital, Rome, Italy;Hospital Clinics, Bari, Italy;Ospedale Nottola, Siena, Italy;University of Catania, Italy;Medika Cardiocenter, Saint Petersburg, Russian Federation;Acibadem City Clinic Tokuda Hospital;Investigaciones Medicas, Buenos Aires, Argentina;Tomsk National Research Scientific Centre of Russian Academy of Sciences, Tomsk, Russian Federation;Instituto Nacional de Cardiología Mexico City, Mexico;Hamad Medical Corporation, Heart Hospital -Doha-Qatar Institute of Clinical Physiology, CNR, Pisa,Italy;Salerno Hospital, Italy;Monaldi Hospital, Napoli, ...