1. Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, Massachusetts 02215, United States
2. Department of Chemical and Systems Biology, ChEM-H, Stanford Cancer Institute, School of Medicine, Stanford University, Stanford, California 94305, United States
3. Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, United States
4. Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, United States
5. Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts 02215, United States
6. Howard Hughes Medical Institute, Boston, Massachusetts 02215, United States