1. Division of Immunology and Pathogenesis, Department of Molecular & Cell Biology, and Cancer Research Laboratory, University of California, Berkeley, CA, USA.
2. Howard Hughes Medical Institute, University of California, Berkeley, CA, USA.
3. Department of Microbiology, Harvard Medical School, Boston, MA, USA.
4. Broad Institute of Harvard and MIT, Cambridge, MA, USA.
5. Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA.