Indiana University Purdue University Indianapolis (IUPUI) - Indiana University School of Medicine, Makerere University, Makerere University, Uganda Cancer Institute, Makerere University, Makerere University, Moi University, affiliation not provided to SSRN, AMPATH Kenya, AMPATH Kenya, Johns Hopkins University - Bloomberg School of Public Health, Johns Hopkins University - Bloomberg School of Public Health, Indiana University, Indiana University Purdue University Indianapolis (IUPUI) - Indiana University School of Medicine, Indiana University and Indiana University Purdue University Indianapolis (IUPUI) - Indiana University School of Medicine