1. Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, North Carolina, USA
2. Department of Biochemistry and Molecular Biology and Department of Microbiology, University of Chicago, Chicago, Illinois, USA
3. Department of Microbiology, Department of Immunology, Department of Medicine, Department of Genome Sciences, University of Washington, Seattle, Washington, USA
4. Department of Immunology and Infectious Disease, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA