1. Department of Electrical Engineering and Computer Science and Center for Computational Biology, University of California Berkeley, Berkeley, CA 94720, USA.
2. Ragon Institute of Massachusetts General Hospital, MIT, and Harvard, Cambridge, MA 02139, USA.
3. Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.
4. Howard Hughes Medical Institute and Koch Institute of Integrative Cancer Biology, Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02140, USA.