1. Faculty of Medicine, Dalhousie University , Halifax, Nova Scotia, Canada
2. Department of Anesthesia, Pain Management & Perioperative Medicine, Dalhousie University and Nova Scotia Health Authority , Halifax, Nova Scotia, Canada
3. Department of Pharmacology, Dalhousie University and Nova Scotia Health Authority , Halifax, Nova Scotia, Canada
4. Department of Psychiatry, Dalhousie University and Nova Scotia Health Authority , Halifax, Nova Scotia, Canada