1. Jhpiego, an affiliate of Johns Hopkins University, Baltimore, Maryland, USA
2. University of California, Los Angeles School of Nursing, Los Angeles, California, USA
3. Duke University, Durham, North Carolina, USA
4. Rakai Health Sciences Program, Kalisizo, Uganda
5. Makerere University, College of Health Sciences, Kampala, Uganda
6. Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
7. University of California, San Diego, La Jolla, California, USA