1 Division of Subacute Care, IRCCS Istituti Clinici Scientifici Maugeri, Via Camaldoli 64, Milan 20138, Italy; Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy; Liverpool Centre for Cardiovascular Sciences at University of Liverpool, John Moores University and Liverpool Heart & Chest Hospital, Liverpool, United Kingdom. Electronic address: marco.proietti@unimi.it.