1. The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.
2. Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
3. Harvard Faculty of Arts and Sciences Center for Systems Biology, Harvard University, Cambridge, MA 02138, USA.
4. Department of Cellular and Molecular Pharmacology, California Institute for Quantitative Biomedical Research, University of California, San Francisco, San Francisco, CA 94158, USA.
5. Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA 02114, USA.
6. Howard Hughes Medical Institute (HHMI), University of California, San Francisco, San Francisco, CA 94158, USA.
7. Harvard Medical School, Boston, MA 02115, USA.
8. Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02140, USA.
9. HHMI, Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02140, USA.