D Cardim1, D E Griesdale2. 1. Department of Anesthesiology, Pharmacology & Therapeutics, University of British Columbia, Vancouver BC, Canada. 2. Department of Anesthesiology, Pharmacology & Therapeutics, University of British Columbia, Vancouver BC, Canada; Department of Medicine, Divisions of Critical Care Medicine and Neurology, University of British Columbia, Vancouver BC, Canada. Electronic address: donald.griesdale@ubc.ca.