1 Department of Global Health and Population, Harvard T H Chan School of Public Health, Boston, MA 02115, USA. Electronic address: jwdeneve@mail.harvard.edu.
2 Department of Global Health and Population, Harvard T H Chan School of Public Health, Boston, MA 02115, USA; Center for Population and Development Studies, Harvard T H Chan School of Public Health, Boston, MA 02115, USA.
3 Center for Population and Development Studies, Harvard T H Chan School of Public Health, Boston, MA 02115, USA; Department of Social and Behavioral Sciences, Harvard T H Chan School of Public Health, Boston, MA 02115, USA.
4 Botswana-Harvard AIDS Institute Partnership, Gaborone, Botswana.
5 Department of Global Health and Center for Global Health and Development, Boston University School of Public Health, Boston, MA, USA.