The authors reply

Affiliation

• ¹ Division of Emergency Medicine, Department of Pediatrics, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA, and Children's Hospital of Philadelphia, PA Department of Anesthesia and Critical Care, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA, and Children's Hospital of Philadelphia, PA Department of Pediatrics, Harvard University School of Medicine, Boston, MA Department of Pediatrics, School of Medicine, University of Colorado, Aurora, CO Department of Pediatrics, University of Cincinnati School of Medicine, Cincinnati, OH Department of Anesthesia and Critical Care, Washington University School of Medicine, St. Louis, MO Department of Pediatrics, Nationwide Children's Hospital, Columbus, OH Children's Hospital of Philadelphia, Philadelphia, PA Department of Emergency Medicine, Wake Forest Baptist Medical Center, Winston-Salem, NC Children's Hospital Association, Overland Park, KS Department of Pediatrics, University of Cincinnati School of Medicine, Cincinnati, OH Department of Pediatrics, Northwestern Feinberg School of Medicine, Chicago, IL.