1. University of California, Los Angeles, Los Angeles, California, USA
2. Johns Hopkins University, Baltimore, Maryland, USA
3. Harvard T. H. Chan School of Public Health, Boston, Massachusetts, USA
4. University of California, San Francisco, San Francisco, California, USA
5. University of Zimbabwe, Harare, Zimbabwe
6. University of North Carolina Project–Malawi, Lilongwe, Malawi
7. College of Medicine, Johns Hopkins Research Project, Blantyre, Malawi
8. FHI 360, Durham, North Carolina, USA
9. National Institutes of Health, Bethesda, Maryland, USA