1. Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts;
2. Department of Parasitology and Mycology, Cheikh Anta Diop University and Le Dantec Hospital, and
3. Institute of Health Research, Epidemiological Surveillance and Training, Dakar, Senegal; and
4. Jos University Teaching Hospital, University of Jos, Nigeria