[1] Boston Childrens Hosp, Stem Cell Program, Boston, MA 02115 USA
[2] Harvard Univ, Dept Stem Cell & Regenerat Biol, Cambridge, MA 02138 USA
[3] Harvard Stem Cell Inst, Cambridge, MA 02138 USA
[4] SIB Swiss Inst Bioinformat, CH-1015 Lausanne, Switzerland
[5] Inst Canc Res, Sarcoma Mol Pathol Team, Div Mol Pathol, Sutton SM2 5NG, Surrey, England
[6] Inst Canc Res, Sarcoma Mol Pathol Team, Div Canc Therapeut, Sutton SM2 5NG, Surrey, England
[7] Royal Marsden NHS Fdn Trust, Dept Histopathol, London SW3 6JJ, England
[8] Univ Aberdeen, Sch Med Sci, Aberdeen AB25 2ZD, Scotland
[9] Univ Aberdeen, Sch Med & Dent, Aberdeen AB25 2ZD, Scotland
[10] Howard Hughes Med Inst, Boston, MA 02115 USA
[11] Harvard Univ, Sch Med, Joslin Diabet Ctr, Boston, MA 02115 USA
[12] Dana Farber Canc Inst, Dept Pediat Oncol, Boston, MA 02115 USA
[13] Childrens Hosp, Div Pediat Hematol Oncol, Boston, MA 02115 USA
[14] Kings Coll London, Randall Div Cell & Mol Biophys, London SE1 1UL, England
[15] Univ Lausanne, Ludwig Ctr Canc Res, CH-1015 Lausanne, Switzerland
[16] Univ Lausanne, Dept Oncol, CH-1015 Lausanne, Switzerland
[17] Univ Torino, Dept Biotechnol & Hlth Sci, Ctr Mol Biotechnol, I-10126 Turin, Italy
[18] Univ British Columbia, Dept Med Genet, Biomed Res Ctr, Vancouver, BC V6T 1Z3, Canada