1. Department of Biological Sciences, University of Pittsburgh , Pittsburgh, Pennsylvania , USA
2. School of Women's and Children's Health, University of New South Wales , Sydney, New South Wales , Australia
3. Department of Respiratory Medicine, Sydney Children's Hospital , Sydney, New South Wales , Australia
4. Inova Fairfax Hospital , Falls Church, Virginia , USA
5. Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine , Baltimore, Maryland , USA
6. Center for Genes, Environment, and Health, National Jewish Health , Denver, Colorado , USA
7. Division of Infectious Diseases, University of North Carolina , Chapel Hill, North Carolina , USA
8. Department of Pharmacy, Division of Pediatric Infectious Diseases, Prisma Health Children's Hospital–Midlands , Columbia, South Carolina , USA
9. Department of Respiratory Disease, Hospital Universitari Vall d’Hebron , Barcelona , Spain
10. New South Wales Health Pathology Microbiology, John Hunter Hospital , New Lambton, New South Wales , Australia
11. Department of Medicine, Division of Infectious Diseases, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania , USA
12. Department of Pediatric Immunology, Great Ormond Street Hospital , London , United Kingdom
13. Department of Immunology and Infectious Diseases, Sydney Children’s Hospital , Randwick, New South Wales , Australia
14. Department of Infectious Diseases and Microbiology, Children's Hospital at Westmead , Westmead, New South Wales , Australia
15. Discipline of Child and Adolescent Health, University of Syndey , Sydney, New South Wales , Australia
16. Division of Infectious Diseases, Brigham and Women’s Hospital , Boston, Massachusetts , USA
17. Great Ormond Street Hospital , London , United Kingdom
18. Miller Children’s and Women’s Hospital, Division of Pediatric Infectious Diseases , Long Beach, California , USA
19. Neonatal and Pediatric Intensive Care Unit, Instituto Giannina Gaslini , Genoa , Italy
20. Department of Medicine, National Jewish Health , Denver, Colorado , USA
21. Department of Medicine, Division of Pulmonary and Critical Care Medicine, Miller School of Medicine, University of Miami , Miami, Florida , USA
22. Internal Medicine Department, Dayton Children’s Hospital, Boonshoft School of Medicine, Wright State University , Dayton, Ohio , USA
23. Department of Respiratory Medicine, The Children's Hospital at Westmead , Westmead, New South Wales , Australia
24. Department of Bacteriology and Immunology, Human Microbiome Research Program, University of Helsinki , Helsinki , Finland
25. Division of Clinical Microbiology, Helsinki University Hospital , Helsinki , Finland
26. Respiratory Medicine and Cardiothoracic Transplantation, Great Ormond Street Hospital , London , United Kingdom
27. Immune Health Program, Hunter Medical Research Institute, University of Newcastle , Callaghan, New South Wales , Australia
28. Division of Infectious Diseases and Global Public Health, Department of Medicine, University of California, San Diego , San Diego, California , USA