1. School of Nursing, University of Washington, Seattle, WA
2. PATH, Kisumu, Kenya
3. Department of Global Health, University of Washington, Seattle, WA
4. Harvard School of Public Health, Harvard University, Boston
5. Ministry of Health-National AIDS and STI Control Program, Nairobi, Kenya
6. Department of Epidemiology and Medicine, University of Washington, Seattle, WA
7. Institute of Tropical Diseases, University of Nairobi, Nairobi, Kenya.