1. Pediatric Clinic, Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy
2. Paediatric Unit, Department of Medical and Surgical Sciences of Mothers, Children and Adults, University of Modena and Reggio Emilia, 41125 Modena, Italy
3. Pediatric Clinic, Scientific Institute for Research and Healthcare (IRCCS) Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
4. Paediatrics and Neonatology Unit, Ravenna Hospital, Azienda Unità Sanitaria Locale (AUSL) Romagna, 48121 Ravenna, Italy
5. Paediatrics Unit, Imola Hospital, 40026 Imola, Italy
6. Paediatric Unit, Carpi Hospital, 41012 Carpi, Italy
7. Paediatrics and Neonatology Unit, Guglielmo da Saliceto Hospital, 29121 Piacenza, Italy
8. Hospital and Territorial Paediatrics Unit, 41026 Pavullo, Italy
9. Paediatrics Unit, Maggiore Hospital, 40133 Bologna, Italy
10. Paediatrics Unit, Santa Maria Nuova Hospital, Azienda Unità Sanitaria Locale (AUSL)-Scientific Institute for Research and Healthcare (IRCCS) of Reggio Emilia, 42123 Reggio Emilia, Italy
11. Paediatrics Unit, Sassuolo Hospital, 41049 Sassuolo, Italy
12. Paediatrics and Paediatric Intensive Care Unit, Cesena Hospital, Azienda Unità Sanitaria Locale (AUSL) Romagna, 47521 Cesena, Italy
13. Paediatrics Unit, Rimini Hospital, Azienda Unità Sanitaria Locale (AUSL) Romagna, 47921 Rimini, Italy
14. Paediatric Clinic, Ferrara Hospital, 44124 Ferrara, Italy
15. Paediatrics Unit, G.B. Morgagni Pierantoni Hospital, Azienda Unità Sanitaria Locale (AUSL) Romagna, 47121 Forlì, Italy
16. Primary Care Pediatricians, Azienda Unità Sanitaria Locale (AUSL) Piacenza, 29121 Piacenza, Italy
17. Primary Care Pediatricians, Azienda Unità Sanitaria Locale (AUSL) Modena, 41125 Modena, Italy
18. Primary Care Pediatricians, Azienda Unità Sanitaria Locale (AUSL) Imola, 40026 Imola, Italy