1 Department of Clinical and Experimental Medicine, Section of Cardiology, University of Messina, and Azienda Ospedaliera Universitaria Policlinico "Gaetano Martino," Messina, Italy. Electronic address: giuseppe.ando@unime.it.
2 Department of Cardiology, Lausanne University Hospital, Lausanne, Switzerland.
3 Department of General Internal Medicine, Lausanne University Hospital, Lausanne, Switzerland.