1. Department of Medicine, University of Washington, Seattle, WA, USA
2. Department of Epidemiology, University of Washington, Seattle, WA, USA
3. Public Health – Seattle & King County, HIV/STD Program, Seattle, WA, USA
4. Department of Global Health, University of Washington, Seattle, WA, USA
5. Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA, USA
6. Department of Industrial & Systems Engineering, University of Washington, Seattle, WA, USA
7. Department of Social Work, Harborview Medical Center, Seattle, WA, USA