1. Epicentre; Médecins Sans Frontières; Paris France
2. Community Health Sciences Unit; Malawi Ministry of Health; Lilongwe Malawi
3. Médecins Sans Frontières; Lilongwe Malawi
4. Médecins Sans Frontières; Paris France
5. Department of HIV/AIDS; World Health Organization; Geneva Switzerland
6. Centre for Infectious Disease Epidemiology and Research; University of Cape Town; Cape Town South Africa
7. UMI 233; Institut de Recherche pour le Développement; Montpellier France