1. Ospedale Policlinico San Martino, 10 Largo Benzi, Genoa 16132, Italy
2. Department of Surgical and Diagnostic Sciences (DISC), Section of Microbiology, University of Genoa, 8 Largo Benzi, Genoa 16132, Italy
3. Department of Internal Medicine and Medical Specialties (DiMI), University of Genoa, 8 Largo Benzi, Genoa 16132, Italy