| Affiliation: | 1. Epidemiology Unit, Bambino Gesù Children’s Hospital, Rome, Italy;2. Department of Pediatrics, University Hospital, Bari, Italy;3. Pediatric Unit, San Giuseppe Hospital, Empoli, Italy;4. Department of Pediatrics, University Hospital, Verona, Italy;5. Department of Pediatrics, S. Camillo‐Forlanini Hospital, Rome, Italy;6. Department of Allergy and Pneumology, Giovanni XXIII Pediatric Hospital, Bari, Italy;7. Department of Pediatric Medicine, Bambino Gesù Hospital, Rome, Italy;8. Pediatric Unit, University Hospital, Bologna, Italy;9. Department of Pediatrics, La Sapienza University, Rome, Italy;10. Pediatric Division, Department of Child and Maternal Medicine, University of Milan Medical School at the Melloni Hospital, Milan, Italy;11. Department of Pediatrics, San Matteo Foundation IRCCS, Pavia, Italy;12. Department of Pediatrics, II University Hospital, Naples, Italy;13. Department of Pediatrics, University Hospital, Padua, Italy;14. Department of Pediatrics, Allergy Unit, University Hospital, Messina, Italy;15. Pediatric Unit, San Giovanni di Dio Hospital, Crotone, Italy;16. Pediatric Allergy Unit, Sandro Pertini Hospital, Rome, Italy |
