1. Center for Vaccine Development, University of Maryland School of Medicine, Baltimore, Maryland, USA
2. Department of Pediatrics, University of Maryland School of Medicine, Baltimore, Maryland, USA
3. Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, USA
4. Vaccines and Immunity Theme, Medical Research Council Unit The Gambia, Banjul, The Gambia
5. Institute of Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA
6. Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
7. Microbiology and Infection Unit, The University of Warwick, Coventry, United Kingdom
8. Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, United Kingdom
9. University of Virginia School of Medicine, Department of Pediatrics, Charlottesville, Virginia, USA