1 Klinik für Innere Medizin III, Kardiologie, Angiologie und Internistische Intensivmedizin, Universitätsklinikum des Saarlandes, Saarland University, Homburg/Saar, Germany.
2 Cape Heart Institute, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.
3 IRCCS San Raffaele Roma, Rome, Italy.
4 San Raffaele Open University in Rome, Rome, Italy.