1 Department of Emergency Medicine, IRCCS Ospedale Casa Sollievo della Soefferenza, San Giovanni Rotondo, Italy. Electronic address: Maggi.css@libero.it.
2 Department of Medical and Pediatric Sciences, University of Catania, Catania, Italy.
3 Medicina Interna, IRCCS Ospedale Casa Sollievo della Soefferenza, Catania, Italy.