1. Centre Population et Développement; Institut de Recherche pour le Développement; Université Paris Descartes; Inserm; Paris France
2. Africa Health Research Institute; KwaZulu-Natal South Africa
3. School of Nursing and Public Health; Africa Health Research Institute; University of KwaZulu-Natal; KwaZulu-Natal South Africa
4. Faculty of Medicine and Faculty of Social, Human and Mathematical Sciences; University of Southampton; Southampton UK
5. Research Department of Infection and Population Health; University College London; London UK
6. Department of Global Health & Infection; Brighton and Sussex Medical School; Falmer Brighton UK
7. ISPED; Inserm; Bordeaux Population Health Research Center; Université de Bordeaux; Bordeaux France
8. Department of Global Health & Population; Harvard School of Public Health; Harvard University; Boston MA USA
9. Institute of Public Health; Faculty of Medicine; Heidelberg University; Heidelberg Germany
10. Division of Infection and Immunity; University College London; London UK