1. Duke Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, USA
2. Department of Pediatrics, Duke University Medical Center, Durham, North Carolina, USA
3. Beth Israel Deaconess Medical Center, Harvard University School of Medicine, Boston, Massachusetts, USA
4. Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA
5. Department of Pathology, Duke University Medical Center, Durham, North Carolina, USA
6. Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
7. Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
8. Vaccine Research Center, National Institutes of Health, Bethesda, Maryland, USA