Alana M Flexman1,2, Laura V Duggan3,4. 1. Department of Anesthesiology and Perioperative Care, Vancouver General Hospital, 899 West 12th Avenue, Vancouver, BC, V5Z 1M9, Canada. alana.flexman@vch.ca. 2. Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, Vancouver, BC, Canada. alana.flexman@vch.ca. 3. Department of Anesthesiology and Perioperative Care, Vancouver General Hospital, 899 West 12th Avenue, Vancouver, BC, V5Z 1M9, Canada. 4. Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, Vancouver, BC, Canada.