1. British Columbia Centre on Substance Use, 400-1045 Howe St., Vancouver, BC, Canada
2. Interdisciplinary Studies Graduate Program, University of British Columbia, Room 270 - 2357 Main Mall, H. R. MacMillan Building, Vancouver, BC, Canada
3. Department of Pediatrics, Boston Medical Center, 850 Harrison Ave., Boston, MA, USA
4. Department of Pediatrics, Boston University School of Medicine, 88 East Newton Street, Vose Hall, Room 322, Boston, MA, USA
5. School of Population and Public Health, University of British Columbia, 2206 E Mall, Vancouver, BC, Canada
6. Division of AIDS, Department of Medicine, University of British Columbia, #667-1081 Burrard Street, Vancouver, BC, Canada
7. Gender and Sexual Health Initiative, St. Paul’s Hospital, #608-1081 Burrard St., Vancouver, BC, Canada
8. School of Public Policy, Simon Fraser University, SFU Harbour Centre, 515 West Hastings Street, Vancouver, BC, Canada