1 Division of Pediatric Allergy and Clinical Immunology, Department of Pediatrics, McGill University Health Center, Montreal, QC, Canada. Electronic address: bruce.miles@mail.mcgill.ca.
2 Division of Pediatric Allergy and Clinical Immunology, Department of Pediatrics, McGill University Health Center, Montreal, QC, Canada.
3 Division of Rheumatology, Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
4 Department of Emergency Medicine, Montreal Children's Hospital, McGill University Health Center, Montreal, QC, Canada.