1. Department of Sociology, McGill University, Montreal, Quebec, Canada
2. School of Social Work, University of British Columbia, Kelowna, British Columbia, Canada
3. Department of Sociology, University of Victoria, Victoria, British Columbia, Canada
4. Department of Family Medicine and Biobehavioral Health, University of Minnesota Medical School, USA
5. Department of Epidemiology and Biostatistics, University of California San Francisco, USA
6. Department of Anthropology, McGill University, Montreal, Quebec, Canada