1. Department of Pediatrics, Emory University School of Medicine , Atlanta, Georgia , USA
2. Department of Medicine, Hope Clinic, Emory University School of Medicine , Atlanta, Georgia , USA
3. Pfizer, Inc , New York, New York , USA
4. Center for Childhood Infections and Vaccines, Children's Healthcare of Atlanta , Atlanta, Georgia , USA
5. Department of Pediatrics (Infectious Diseases), Yale–New Haven Hospital , New Haven, Connecticut , USA
6. Department of Epidemiology of Microbial Diseases, Yale School of Public Health , New Haven, Connecticut , USA
7. Yale School of Public Health, Yale Institute for Global Health , New Haven, Connecticut , USA
8. Center for Infection and Immunity, Yale School of Medicine , New Haven, Connecticut , USA