1. Partnership for Research on Vaccines and Infectious Diseases in Liberia (PREVAIL) , Monrovia , Liberia
2. A.M. Dogliotti College of Medicine, University of Liberia , Monrovia , Liberia
3. Division of Biostatistics, University of Minnesota , Minneapolis, Minnesota , USA
4. Department of Epidemiology and Biostatistics, University of California , San Francisco, California , USA
5. Department of Medicine, Brigham and Women’s Hospital , Boston, Minnesota , USA
6. Department of Global Health and Social Medicine, Harvard Medical School , Boston, Minnesota , USA
7. Division of HIV, Infectious Disease, and Global Medicine, Department of Medicine, University of California , San Francisco, California , USA
8. Francis I. Proctor Foundation, University of California , San Francisco, California , USA
9. Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases , Bethesda, Maryland , USA
10. Institute for Global Health Sciences, University of California , San Francisco, California , USA