1. Department of Psychiatry, University of Alberta, Edmonton, AB T6G 2R3, Canada
2. Department of Critical Care Medicine, King Abdul-Aziz Hospital, Jeddah 22421, Saudi Arabia
3. Department of Psychiatry, University of British Columbia, Vancouver Island, BC V6T 1Z4, Canada
4. Department of Psychiatry, University of Calgary, Calgary, AB T2N 1N4, Canada
5. Alberta Health Services, Edmonton, AB T5J 3E4, Canada
6. Department of Psychiatry, Dalhousie University, Halifax, NS B3H 2E2, Canada