1. Canadian Association of People Who Use Drugs, Dartmouth, Nova Scotia, Canada
2. Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Quebec, Canada
3. Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
4. Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
5. School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada