1. Paediatric Clinic, Pietro Barilla Children´s Hospital, University of Parma, Parma, Italy
2. Azienda Unità Sanitaria Locale (AUSL) di Modena, Modena, Italy
3. Department of Paediatrics, Infermi Hospital Rimini, ASL Romagna, Rimini, Italy
4. Unit of Microbiology, Greater Romagna Area Hub Laboratory, Pievesestina di Cesena (FC), Italy
5. Department of Paediatrics, Santa Maria delle Croci Hospital, Ravenna, Italy
6. Paediatric Clinic, ASL Romagna, Cesena, Italy
7. Department of Paediatrics, AUSL Romagna, Forlì, Italy
8. Paediatrics and Neonatology Unit, Guglielmo da Saliceto Hospital, Piacenza, Italy
9. Emergency Paediatrics, Policlinico Sant´Orsola, University of Bologna, Bologna, Italy
10. General and Emergency Paediatrics, Pietro Barilla Children´s Hospital, Parma, Italy
11. Paediatric Community Unit, ASL Romagna, Rimini, Italy
12. Paediatric Community Unit, ASL Romagna, Ravenna, Italy
13. Paediatric Emergency Unit, Guglielmo da Saliceto City Hospital, Piacenza, Italy
14. Laboratory of Hygiene and Public Health, Department of Medicine and Surgery, University of Parma, Parma, Italy
15. Microbiology Unit, Policlinico Sant´Orsola, University of Bologna, Bologna, Italy
16. Università degli Studi di Milano, Milan, Italy, , Email: susannamariaroberta.esposito@unipr.it