1. The authors contributed equally this article
2. Infectious Diseases Unit, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
3. Microbiology Unit, Azienda Ospedaliera Universitaria Pisana, Pisa, Italy
4. Department of Anaesthesia and Critical Care Medicine, Azienda Ospedaliera Universitaria Pisana, Pisa, Italy
5. Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy