1. University of North Carolina School of Medicine, Chapel Hill, North Carolina;
2. University of Colorado School of Medicine and Children’s Hospital Colorado, Aurora, Colorado;
3. Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine, Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany;
4. Berlin Institute of Health, Charité–Universitätsmedizin Berlin, Berlin, Germany;
5. German Center for Lung Research, Associated Partner, Berlin, Germany;
6. Ann & Robert H. Lurie Children’s Hospital of Chicago and Northwestern University Feinberg School of Medicine, Chicago, Illinois;
7. St. Vincent’s Hospital, Dublin, Ireland;
8. Seattle Children’s Research Institute, Seattle, Washington;
9. Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington;
10. University of British Columbia and British Columbia Children’s Hospital, Vancouver, British Columbia, Canada;
11. The Royal Children’s Hospital, Murdoch Children’s Research Institute, Melbourne, Victoria, Australia;
12. Department of Pediatrics, University of Melbourne, Melbourne, Victoria, Australia;
13. Children’s Hospital, University of Duisburg-Essen, Essen, Germany;
14. National Jewish Health, Denver, Colorado;
15. St. Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada;
16. Vertex Pharmaceuticals Inc., Boston, Massachusetts; and
17. University of Toronto, Toronto, Ontario, Canada