Department of Systems Biology, Harvard Medical School, Boston, MA, USA.|Department of Systems Biology, Harvard Medical School, Boston, MA, USA.|Department of Systems Biology, Harvard Medical School, Boston, MA, USA.|Department of Systems Biology, Harvard Medical School, Boston, MA, USA.|Department of Systems Biology, Harvard Medical School, Boston, MA, USA.|Department of Systems Biology, Harvard Medical School, Boston, MA, USA.|Department of Systems Biology, Harvard Medical School, Boston, MA, USA.|Department of Systems Biology, Harvard Medical School, Boston, MA, USA.|Department of Systems Biology, Harvard Medical School, Boston, MA, USA.|Department of Systems Biology, Harvard Medical School, Boston, MA, USA.|Department of Systems Biology, Harvard Medical School, Boston, MA, USA.|Computational Biology Center, Memorial Sloan Kettering Cancer Center, New York, NY, USA.|Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, USA.|Department of Systems Biology, Harvard Medical School, Boston, MA, USA.|Department of Cell Biology, Harvard Medical School, Boston, MA, USA.|Department of Systems Biology, Harvard Medical School, Boston, MA, USA.