From the Department of Paediatrics (Kovesi), Children’s Hospital of Eastern Ontario, University of Ottawa, Ottawa, Ont.; the Division of Paediatric Emergency Medicine (Schuh), Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ont.; the Division of Pediatric Respiratory Medicine (Spier), Alberta Children’s Hospital, University of Calgary, Calgary, Alta.; the Division of Pediatric Pulmonology (Bérubé), CHU Sainte-Justine, Université de Montréal, Montréal, Que.; the Division of Clinical Immunology and Allergy (Carr), Department of Pediatrics, University of Alberta, Edmonton, Alta.; the Division of Allergy (Watson), Izaak Walton Killam Health Centre, Dalhousie University, Halifax, NS; Firestone Institute for Respiratory Research (McIvor), McMaster University, Hamilton, Ont.; and the Department of Respiratory Medicine (McIvor), St. Joseph’s Healthcare, Hamilton, Ont.