1. Pediatric Unit, Department of Medical and Surgical Sciences University of Bologna Bologna Italy
2. Pediatric Department and Pediatric Allergology Unit Sandro Pertini Hospital Rome Italy
3. Consultancy & Training, Biostatistics L’altrastatistica srl Rome Italy
4. Department of Pediatric Pneumology and Immunology Charite Medical University Berlin Germany
5. Pediatric Emergency Unit S. Orsola‐Malpighi Hospital Bologna Italy
6. Pediatric Unit San Giuseppe Hospital Empoli Italy
7. Clinica Pediatrica, Department of Medicine and Surgery University of Parma Parma Italy
8. Pediatra di Libera Scelta Benevento Italy
9. UOSD di Immunopatologia ed Allergologia Pediatrica, Policlinico Tor Vergata Università di Roma Tor Vergata Rome Italy
10. Department of Clinical and Experimental Medicine, Section of Paediatrics University of Pisa Pisa Italy
11. Department of Clinical Immunology and Allergology I.M. Sechenov First Moscow State Medical University Moscow Russia
12. Pediatric Department La Sapienza University Rome Italy
13. Dipartimento della Donna, del Bambino e di Chirurgia Generale e Specialistica Università della Campania Luigi Vanvitelli Naples Italy
14. Pediatric Unit Fatebenefratelli Hospital Benevento Italy
15. TPS Production Rome Italy
16. Pediatric Intermediate Care Unit Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico Milan Italy