1. Department of Pathology and Center for Cancer Research, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA.
2. Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA.
3. Department of Neurosurgery, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA.
4. Institute of Pathology, Faculty of Biology and Medicine, Centre Hospitalier Universitaire Vaudois, 1011 Lausanne, Switzerland.
5. Department of Pediatric Oncology, Dana-Farber Cancer Institute and Children’s Hospital Cancer Center, Boston, MA 02215, USA.
6. Departments of Neurology, Neurosurgery, Pediatrics and Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA.
7. Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA.
8. Departments of Medicine and Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA.
9. Koch Institute and Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.