Affiliation: | 1.Department of Psychiatry, University of British Columbia, David Strangway Building, 5950 University Boulevard, Vancouver, BC, V6T 1Z3, Canada ;2.School of Public Health, University of Alberta, Edmonton, AB, Canada ;3.Department of Psychiatry, Tanta University, Tanta, Egypt ;4.Faculty of Dentistry, McGill University, Montreal, QC, Canada ; |