1. Research Department; Médecins Sans Frontières; Mbabane Swaziland
2. Department of Population Health; London School of Hygiene and Tropical Medicine; London United Kingdom
3. Research Department; Médecins Sans Frontières; Geneva Switzerland
4. The Manson Unit; Médecins Sans Frontières; London United Kingdom
5. Swaziland National AIDS Programme (SNAP); Ministry of Health; Mbabane Swaziland
6. Swaziland National Reference Laboratory (NRL); Ministry of Health; Mbabane Swaziland
7. Division of Global HIV/AIDS; The Centre for Disease Control; Atlanta GA USA
8. South African Medical Unit; Médecins Sans Frontières; Cape Town South Africa