Department of Translational Medical Sciences, University of Naples "Federico II", Via S. Pansini, 80131, Naples, Italy. Department of Emergency, A.O.R.N. Antonio Cardarelli, Naples, Italy. Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy. San Raffaele Roma Open University, 00166, Rome, Italy. Division of Internal Medicine, AOU San Giovanni di Dio e Ruggi di Aragona, Salerno, Italy. Department of Medicine and Health Sciences, University of Molise, Campobasso, Italy. Heart Transplantation Unit, Monaldi Hospital, Azienda Ospedaliera dei Colli, Naples, Italy. Department of Translational Medical Sciences, University of Naples "Federico II", Via S. Pansini, 80131, Naples, Italy. p.abete@unina.it.