1. Microbiology Section of the Department of Experimental, Diagnostic and Specialty Medicine, School of Medicine, University of Bologna, Via Massarenti, 9, Bologna, Italy
2. Unit of Infectious Diseases, Department of Medical and Surgical Sciences, School of Medicine, University of Bologna, Via Massarenti, 9, Bologna, Italy
3. Unit of Microbiology Department of Diagnostic and Public Health, University of Verona, Verona, Italy