1. Centre pour le Développement des Vaccins du Mali (CVD-Mali) , Bamako , Mali
2. Center for Vaccine Development and Global Health, University of Maryland School of Medicine , Baltimore, Maryland , USA
3. Department of Pediatrics, University of Maryland School of Medicine , Baltimore, Maryland , USA
4. Kenya Medical Research Institute, Center for Global Health Research (KEMRI-CGHR) , Kisumu , Kenya
5. Medical Research Council Unit The Gambia at the London School of Hygiene & Tropical Medicine , Banjul , The Gambia
6. Department of Medicine, University of Maryland School of Medicine , Baltimore, Maryland , USA
7. Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia , Charlottesville, Virginia , USA
8. Division of Global Health Protection, US Centers for Disease Control and Prevention , Nairobi , Kenya
9. Division of Viral Diseases, US Centers for Disease Control and Prevention , Atlanta, Georgia , USA