1 Department of Medical and Surgical Sciences, Paediatric Emergency Unit, St Orsola Polyclinic, University of Bologna, Bologna, Italy.
2 Department of Specialised, Experimental and Diagnostic Medicine, Operative Unit of Clinical Microbiology, St Orsola Polyclinic, University of Bologna, Bologna, Italy. Electronic address: [email protected].
3 Department of Specialised, Experimental and Diagnostic Medicine, Operative Unit of Clinical Microbiology, St Orsola Polyclinic, University of Bologna, Bologna, Italy.