1. Division of Pulmonary, Critical Care, and Sleep Medicine, Miller School of Medicine, University of Miami, Miami, Florida;
2. Division of Critical Care Medicine, Albert Einstein College of Medicine, Bronx, New York;
3. Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada; and
4. Department of Anesthesiology and Pain Medicine and
5. Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada