Affiliation: | a Section of Hospital Medicine and Emergency Resuscitation Center, University of Chicago, Chicago, IL, United States b Stritch School of Medicine, Loyola University, Chicago, IL, United States c Laerdal Medical AS, Stavanger, Norway d Department of Medicine, MacNeal Hospital, Berwyn, IL, United States e Section of Emergency Medicine and Emergency Resuscitation Center, University of Chicago, Chicago, IL, United States f Department of Emergency Medicine and Center for Resuscitation Science, University of Pennsylvania, Philadelphia, PA, United States |