1. Pediatric Clinic, Pietro Barilla Children’s Hospital, Department of Medicine and Surgery, University Hospital of Parma, 43126 Parma, Italy
2. Department of Pathophysiology and Transplantation, Università degli Studi di Milano, 20122 Milan, Italy
3. Respiratory Unit and Cystic Fibrosis Center, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico Milano, 20122 Milan, Italy
4. Department of Paediatrics, The University of Melbourne, Parkville, VIC 3010, Australia
5. Department of Infectious Diseases, The Royal Children’s Hospital Melbourne, Parkville, VIC 3010, Australia
6. Division of Infectious Diseases, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA
7. Division of Microbiology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
8. Infectious Diseases Unit, Azienda Ospedaliero-Universitaria of Modena, 41124 Modena, Italy
9. Infectious and Tropical Diseases Unit, Department of Medicine and Surgery, University of Insubria-ASST-Sette Laghi, 21110 Varese, Italy
10. Department of Pediatrics, Hospital Universitari Germans Trias i Pujol, Carretera de Canyet, 08916 Barcelona, Spain
11. Germans Trias i Pujol Research Institute, Carretera de Can Ruti, Camí de les Escoles, 08916 Badalona, Spain
12. Division of Infectious Diseases, Department of Health Sciences (DISSAL), University of Genova, 16132 Genoa, Italy
13. IRCCS Ospedale Policlinico San Martino, 16132 Genoa, Italy
14. Università degli Studi di Milano, 20122 Milan, Italy