Sarah M. Perman, MD, MSCE 
Department of Emergency Medicine, Yale School of Medicine, 464 Congress Avenue, New Haven, CT 06519, USA
Robert A. Berg, MD 
Department of Anesthesiology, Critical Care and Pediatrics, Division of Pediatric Critical Care, Children’s Hospital of Philadelphia, University of Pennsylvania Perelman School of Medicine, 3401 Civic Center Boulevard, Philadelphia, PA 19104, USA
Vinay M. Nadkarni, MD 
Department of Anesthesiology, Critical Care and Pediatrics, Division of Pediatric Critical Care, Children’s Hospital of Philadelphia, University of Pennsylvania Perelman School of Medicine, 3401 Civic Center Boulevard, Philadelphia, PA 19104, USA