1. Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA.
2. Department of Microbiology and Immunology, University of Illinois at Chicago College of Medicine, Chicago, IL, USA.
3. Department of Immunology and Infectious Disease, Harvard T. H. Chan School of Public Health, Boston, MA, USA.
4. Kimmel Center for Biology and Medicine at the Skirball Institute and Department of Microbiology, New York University School of Medicine, New York, NY 10016, USA.
5. Department of Immunology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA.
6. Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA.