1. CDC Foundation, Atlanta, Georgia;
2. Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, Minnesota;
3. Division of Global Pediatrics, University of Minnesota, Minneapolis, Minnesota;
4. Division of Biostatistics, University of Minnesota, Minneapolis, Minnesota;
5. Jaramogi Oginga Odinga University of Science and Technology, Bondo, Kenya;
6. Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya;
7. Department of Pediatrics, Indiana University, Indianapolis, Indiana