1. Division of Critical Care Medicine, University of British Columbia, Vancouver, British Columbia, Canada
2. Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
3. Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada; and
4. Cardio-Pulmonary Department, Pulmonary Division, Heart Institute (Incor), University of São Paulo, São Paulo, Brazil