1 Department of Emergency Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM; Department of Anesthesiology, University of New Mexico Health Sciences Center, Albuquerque, NM. Electronic address: dbraude@salud.unm.edu.
2 Department of Emergency Medicine, University of Wisconsin, Madison, WI.
3 Department of Emergency Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM; Division of Adult Critical Care, University of New Mexico Health Sciences Center, Albuquerque, NM.
4 Department of Anesthesiology, University of Wisconsin, Madison, WI.