1. Department of Microbiology, Harvard Medical School, Boston, Massachusetts 02115, United States
2. Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts 02114, United States
3. Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
4. T.H. Chan School of Public Health, Harvard University, Boston, Massachusetts 02115, United States
5. Broad Institute of MIT and Harvard University, Cambridge, Massachusetts 02142, United States