1. Department of Integrative Immunobiology, Duke University School of Medicine, Durham, North Carolina, USA
2. Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, North Carolina, USA
3. Department of Cell Biology, Duke University School of Medicine, Durham, North Carolina, USA
4. Department of Pathology, Duke University School of Medicine, Durham, North Carolina, USA
5. Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
6. Department of Biomedical Engineering, Duke University Pratt School of Engineering, Durham, North Carolina, USA