1. Division of Infectious Diseases and Global Public Health, School of Medicine, University of California San Diego, San Diego, California, USA.
2. Department of Health Policy and Management, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA.
3. Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada.
4. AIDS Action Baltimore, Baltimore, Maryland, USA.
5. PATIENTS Program, University of Maryland, College Park, Maryland, USA.
6. Department of Family and Community Health, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
7. Division of Vulnerable Populations, Department of Medicine, University of California San Francisco, San Francisco, California, USA.