1. Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario M5G 1X5, Canada.
2. Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada.
3. Department of Biochemistry, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt.
4. Whitehead Institute for Biomedical Research, Nine Cambridge Center, Cambridge, MA 02142, USA.
5. Banting and Best Diabetes Centre, Toronto General Research Institute, Faculty of Medicine, University of Toronto, Toronto, Ontario M5G 1L6, Canada.
6. Department of Biology, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA.
7. David H. Koch Institute for Integrative Cancer Research at MIT, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.
8. Broad Institute, Seven Cambridge Center, Cambridge, MA 02142, USA.
9. Howard Hughes Medical Institute, MIT, Cambridge, MA 02139, USA.