1. The Ontario HIV Treatment Network, Toronto, Ontario, Canada.
2. Department of Medicine, University of Calgary, Calgary, Alberta, Canada.
3. Department of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada.
4. Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.
5. Centre for Research on Inner City Health and The Keenan Research Centre in the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada.
6. Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada.
7. Department of Psychology, Ryerson University, Toronto, Ontario, Canada.