1. Microbiology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Via Massarenti 9, 40138 Bologna, Italy
2. Pediatric Emergency Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Via Massarenti 9, 40138 Bologna, Italy
3. Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy
4. Specialty School of Pediatrics, Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy