[1] Massachusetts Gen Hosp, Ctr Canc Res, Mol Pathol Unit, Charlestown, MA 02129 USA
[2] Massachusetts Gen Hosp, Ctr Computat & Integrat Biol, Charlestown, MA 02129 USA
[3] Harvard Univ, Dept Mol & Cellular Biol, Cambridge, MA 02138 USA
[4] Harvard Med Sch, Dept Pathol, Boston, MA 02115 USA
[5] Harvard Med Sch, Dana Farber Canc Inst, Boston Childrens Hosp,Dept Pediat Oncol, Harvard Stem Cell Inst,Dept Pediat,Div Hematol On, Boston, MA USA