1. Department of Pathology, Johns Hopkins School of Medicine, Baltimore, Maryland;
2. Infectious Disease Clinical Research Program, Uniformed University of the Health Sciences, Bethesda, Maryland;
3. Department of Microbiology, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania;
4. Dana Center for Preventive Ophthalmology, Johns Hopkins School of Medicine, Baltimore, Maryland;
5. National Institute for Medical Research, Kilosa, Tanzania;
6. Francis I Proctor Foundation, University of California, San Francisco, San Francisco, California