Gianni R Lorello1,2,3, Alana M Flexman4,5. 1. Department of Anesthesia, University of Toronto, Toronto, ON, Canada. Gianni.Lorello@uhn.ca. 2. Toronto Western Hospital, University Health Network, Toronto, ON, Canada. Gianni.Lorello@uhn.ca. 3. The Wilson Centre, University Health Network, Toronto, ON, Canada. Gianni.Lorello@uhn.ca. 4. Vancouver General Hospital - Department of Anesthesiology, Vancouver, BC, Canada. 5. Department of Anesthesiology, Pharmacology and Therapeutics, The University of British Columbia, Vancouver, BC, Canada.