1. Department of Otolaryngology–Head and Neck Surgery, McGill University, Montreal, Quebec, Canada
2. Department of Otolaryngology–Head and Neck Surgery, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
3. Department of Otolaryngology–Head and Neck Surgery, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
4. Division of Pediatric Respiratory Medicine, McGill University Health Centre Research Institute, Montreal Children’s Hospital McGill University, Montreal, Quebec, Canada
5. Department of Respiratory Medicine, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
6. Department of Medicine, Marsico Lung Institute, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
7. Department of Pathology and Laboratory Medicine, Marsico Lung Institute, University of North Carolina, Chapel Hill, North Carolina, USA
8. Department of Pediatrics, Marsico Lung Institute, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
9. Department of Otolaryngology, Hospital de Niños Luis Calvo Mackenna, Universidad de Chile, Clínica Las Condes, Santiago, Chile