1. Department of Medical Sciences and Public Health, University of Cagliari, Monserrato, Italy
2. Kantonsspital Graubünden, 7000 Chur, Department ANIR, Intensivmedizin, Switzerland
3. Anesthesia and Intensive Care Service, Emergency Department, Azienda Ospedaliero Universitaria di Ferrara, Cona FE, Italy
4. Azienda Ospedaliera Brotzu, San Michele Hospital, Microbiology, Piazzale Alessandro Ricchi, Cagliari, Italy
5. Azienda Ospedaliera Brotzu, San Michele Hospital, Intensive Care Unit, Piazzale Alessandro Ricchi, Cagliari, Italy