Affiliation: | 1. Department of Medicine, Division of Emergency Medicine, McMaster University, Hamilton, Ontario, Canada;2. Department of Emergency Medicine, University of Maryland Upper Chesapeake Medical Center, Bel Air, Maryland, USA Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA;3. Department of Medicine, Division of Emergency Medicine, McMaster University, Hamilton, Ontario, Canada Department of Medicine, Division of Critical Care, McMaster University, Hamilton, Ontario, Canada;4. Division of Otolaryngology–Head & Neck Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA;5. Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA |