1. Department of Computer Science, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA.
2. Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.
3. Department of Statistics, University of Oxford, Oxford OX1 3TG, UK.
4. Department of Mathematics, Harvard College, Cambridge, MA 02138, USA.
5. Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, Israel.
6. Center for Systems Biology, Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA.
7. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK.
8. Department of Biology, MIT, Cambridge, MA 02139, USA.
9. Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA.
10. School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.