1 Department of Emergency Medicine and Division of Pulmonary and Critical Care, University of Maryland Medical Center, Baltimore, MD. Electronic address: rory.spiegel@umm.edu.
2 Division of Pulmonary and Critical Care Medicine, Larner College of Medicine at the University of Vermont, Burlington, VT.
3 Intensive Care Unit, Santa Cabrini Hospital, Montreal, Quebec, Canada.
4 Flosonics Medical, Toronto, Ontario, Canada.
5 Department of Perioperative Medicine, St Bartholomew's Hospital, London, UK.
6 Department of Internal Medicine and Pulmonary and Critical Care Medicine, Eastern Virginia Medical School.