1 Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, United States of America; Department of Emergency Medicine, Brigham and Women's Hospital, Boston, MA, United States of America; Department of Emergency Medicine, Harvard Medical School, Boston, MA, United States of America.
2 Department of Anesthesiology and Pain Medicine, University of Toronto, ON, Canada; Interdepartmental Division of Critical Care Medicine, University of Toronto, ON, Canada; Department of Anesthesia and Pain Medicine, Toronto General Hospital, Toronto, ON, Canada.
3 Division of Anesthesia Critical Care, Department of Anesthesia, Tufts Medical Center, Boston, MA, United States of America.
4 Department of Emergency Medicine, Brigham and Women's Hospital, Boston, MA, United States of America; Department of Emergency Medicine, Harvard Medical School, Boston, MA, United States of America; Division of Emergency Critical Care Medicine, Department of Emergency Medicine, Brigham and Women's Hospital, Boston, MA, United States of America.
5 Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, United States of America; Department of Emergency Medicine, Brigham and Women's Hospital, Boston, MA, United States of America; Department of Emergency Medicine, Harvard Medical School, Boston, MA, United States of America; Division of Emergency Critical Care Medicine, Department of Emergency Medicine, Brigham and Women's Hospital, Boston, MA, United States of America.
6 Department of Emergency Medicine, Brigham and Women's Hospital, Boston, MA, United States of America; Department of Emergency Medicine, Harvard Medical School, Boston, MA, United States of America; Division of Emergency Critical Care Medicine, Department of Emergency Medicine, Brigham and Women's Hospital, Boston, MA, United States of America. Electronic address: ailg@bwh.harvard.edu.