1. Center for Systems Biology, Massachusetts General Hospital, Boston, MA 02114, USA.
2. Department of Radiology, Massachusetts General Hospital, Boston, MA 02114, USA.
3. Department of Surgery, Massachusetts General Hospital, Boston, MA 02114, USA.
4. Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.
5. Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA 02215, USA.
6. Department of Health Sciences, Northeastern University, Boston, MA 02115, USA.
7. Massachusetts General Hospital Cancer Center, Boston, MA 02114, USA.
8. Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA.