1. Department of Medicine, University of British Columbia, Vancouver, Canada
2. British Columbia Centre for Excellence in HIV/AIDS, Vancouver, Canada
3. Centre for Addictions Research of British Columbia, University of Victoria, Victoria, Canada
4. Department of Anthropology, University of Victoria, Victoria, Canada
5. School of Public Health and Social Policy, University of Victoria, Victoria, Canada
6. Faculty of Health Sciences, Simon Fraser University, Vancouver, Canada
7. Community Based Research Centre for Gay Men’s Health, Vancouver, Canada
8. Community Advisory Board, Momentum Health Study, Vancouver, Canada