1. Duke University Human Vaccine Institute, Duke University School of Medicine, Durham, NC 27710, USA.
2. Department of Immunology, Duke University School of Medicine, Durham, NC 27710, USA.
3. Department of Pediatrics, Duke University School of Medicine, Durham, NC 27710, USA.
4. Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7FZ, UK.
5. Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA.
6. University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
7. Department of Surgery, Duke University School of Medicine, Durham, NC 27710, USA.
8. Department of Pathology, Duke University School of Medicine, Durham, NC 27710, USA.
9. Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20814, USA.
10. Institute for Genomic Medicine, Columbia University, New York, NY 10032, USA.