1. Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, Colorado, USA
2. Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, USA
3. Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
4. Department of Pathology and Laboratory Medicine, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
5. Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri, USA
6. Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
7. The Andrew M. and Jane M. Bursky Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, Missouri, USA