1. Department of Epidemiology & Population Health, BC Centre for Excellence in HIV/AIDS, Vancouver, British Columbia, Canada;
2. Interdisciplinary Studies Graduate Program, University of British Columbia, Vancouver, British Columbia, Canada;
3. Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada;
4. Population Data BC, University of British Columbia, Vancouver, British Columbia, Canada;
5. Community Advisory Board, Momentum Health Study, Vancouver, British Columbia, Canada;
6. School of Public Health & Social Policy, University of Victoria, Victoria, British Columbia, Canada;
7. Centre for Addictions Research BC, Victoria, British Columbia, Canada;
8. Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada;
9. Department of Anthropology, University of Victoria, Victoria, British Columbia, Canada