[1] Dana Farber Canc Inst, Dept Med Oncol, Boston, MA 02115 USA
[2] Dana Farber Canc Inst, Dept Canc Biol, Boston, MA 02115 USA
[3] Brigham & Womens Hosp, Dept Med, Boston, MA 02115 USA
[4] Harvard Univ, Sch Med, Dept Med, Boston, MA 02115 USA
[5] Novartis Inst Biomed Res, Dept Oncol, Cambridge, MA 02139 USA
[6] Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA
[7] Univ Calif Santa Cruz, Inst Marine Sci, Santa Cruz, CA 95064 USA