1. Stem Cell Program and Division of Hematology/Oncology, Boston Children’s Hospital, Howard Hughes Medical Institute, Boston, MA 02115, USA.
2. Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02115, USA.
3. Department of Computational Biology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA.
4. The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
5. Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
6. Institute of Structural Biology, University of Bonn, 53127 Bonn, Germany.
7. University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA.
8. Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA.
9. Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD 20850, USA.
10. Whitehead Institute for Biomedical Research, Massachusetts Institute of Technology, Cambridge, MA 02142, USA.
11. Center for RNA Biology, University of Rochester, Rochester, NY 14642, USA.
12. Center for Biomedical Informatics, University of Rochester, Rochester, NY 14642, USA.