Affiliation: | 1. Department of Pediatrics, Division of Pediatric Emergency Medicine, Sidra Medical and Research Centre, Doha, Qatar;2. Department of Pediatrics, Division of Pediatric Emergency Medicine, Hamad Medical Corporation, Doha, Qatar;3. Weill Cornell Medical College, all Doha, Qatar;4. Division of Pulmonary and Critical Care Medicine, University of Washington School of Medicine, Seattle, Washington |