1. Division of Global HIV & TB, U.S. Centers for Disease Control and Prevention, Maputo, Mozambique.
2. Division of Global HIV & TB, U.S. Centers for Disease Control and Prevention, Nairobi, Kenya.
3. National AIDS & STI Control Programme, Ministry of Health, Nairobi, Kenya.
4. Division of Global HIV & TB, U.S. Centers for Disease Control and Prevention, Atlanta, Georgia, USA.
5. Central America Regional Office, U.S. Centers for Disease Control and Prevention, Guatemala City, Guatemala.
6. Survey Unit, ICAP at Columbia University, New York, New York, USA.
7. Department of Statistics and Actuarial Sciences, Jomo Kenyatta University of Agriculture and Technology, Juja, Kenya.
8. National Public Health Laboratory, Ministry of Health, Nairobi, Kenya.
9. Ministry of Health, Nairobi, Kenya.