1. Department of Pediatrics, Division of Infectious Diseases, Emory University School of Medicine, Atlanta, Georgia, USA
2. Emory Vaccine Center, Yerkes National Primate Research Center, Atlanta, Georgia, USA
3. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
4. Department of Microbiology and Immunology, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, USA
5. Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia, USA