1 Department of Anesthesiological, Surgical and Emergency Sciences, Second University of Naples, Piazza Miraglia 2, 80138 Naples, Italy. Electronic address: marco.fiore@hotmail.it.
2 Department of Infectious Diseases, Azienda Ospedaliera Universitaria San Giovanni di Dio e Ruggi d'Aragona, Università di Salerno, Largo Città di Ippocrate, 84131 Salerno, Italy.