[1] Dana Farber Canc Inst, Dept Canc Biol, Boston, MA 02215 USA
[2] Harvard Med Sch, Blavatn Inst, Dept Genet, Boston, MA 02115 USA
[3] Dana Farber Canc Inst, Dept Oncol Pathol, Boston, MA 02215 USA
[4] Harvard Med Sch, Dept Cell Biol, Boston, MA 02115 USA
[5] Peking Univ, Sch Life Sci, Beijing 100871, Peoples R China
[6] Whitehead Inst Biomed Res, Cambridge, MA 02142 USA
[7] MIT, Dept Biol, Cambridge, MA 02142 USA
[8] Univ Toronto, Dept Cell & Syst Biol, Toronto, ON M5S 3B2, Canada
[9] Stanford Univ, Inst Stem Cell Biol & Regenerat Med, Med Sch, Stanford, CA 94305 USA
[10] Stanford Univ, Dept Pathol, Med Sch, Stanford, CA 94305 USA
[11] Ctr Anal Genome Evolut & Funct, Toronto, ON M5S 3B2, Canada