1. Division of Infectious Diseases, IRCCS Ospedale Policlinico San Martino, 16132 Genova, Italy
2. Division of Infectious Diseases, Department of Health Sciences (DISSAL), University of Genova, 16132 Genova, Italy
3. Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, 16132 Genoa, Italy
4. Microbiology Unit, San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, 16132 Genoa, Italy
5. Hygiene Unit, San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, 16132 Genoa, Italy