Affiliation: | 1. The Division of Emergency Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA;2. The Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Hospital of the University of Pennsylvania, Philadelphia, PA;3. Department of Emergency Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA;4. The Hospital of the University of Pennsylvania, Emergency Medicine Residency, Philadelphia, PA;5. The Boston Combined Residency Program for Pediatrics, Boston, MA |