1. The Ontario HIV Treatment Network, Toronto, Canada.
2. Institute for Mental Health Policy Research, Centre for Addiction and Mental Health, Toronto, Canada.
3. Department of Psychiatry, University of Toronto, Toronto, Canada.
4. Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Canada.
5. Baycrest Health Sciences, Toronto, Canada.
6. Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.
7. Toronto General Research Institute, University Health Network, Toronto, Canada.
8. Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Canada.
9. St. Joseph's Health Care, Hamilton, Canada.
10. The AIDS Network, Hamilton, Canada.
11. Maple Leaf Medical Clinic, Toronto, Canada.
12. Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada.
13. Department of Family and Community Medicine, St. Michael's Hospital, Toronto, Canada.