1. AIDS Control Program, Ministry of Health, Nakasero, Uganda
2. College of Health Sciences, School of Public Health, Department of Epidemiology and Biostatistics, Makerere University, Nakasero, Uganda
3. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
4. College of Health Sciences, School of Public Health, Department of Disease Control and Environmental Health, Makerere University, Nakasero, Uganda
5. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA