1. Faculty of Science, University of British Columbia, Vancouver, BC, Canada;
2. British Columbia Centre for Excellence in HIV/AIDS, Vancouver, BC, Canada;
3. Psychology Department, University of Southampton, Southampton, UK;
4. St. Paul’s Hospital, Vancouver, BC, Canada;
5. Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada;
6. University of Victoria, Victoria, BC, Canada;
7. Canadian Institute for Substance Use Research, Victoria, BC, Canada;
8. Simon Fraser University, Burnaby, BC, Canada