[1] Harvard Univ, Sch Med, Harbin Inst Med, Harvard Stem Cell Inst, Boston, MA 02115 USA
[2] Albert Einstein Coll Med, Dept Cell Biol, Bronx, NY 10461 USA
[3] Albert Einstein Coll Med, Albert Einstein Canc Ctr, Bronx, NY 10461 USA
[4] Max Delbruck Ctr Mol Med, D-13092 Berlin, Germany
[5] Univ Leeds, St Jamess Univ Hosp, Leeds Inst Mol Med, Leeds LS7 4JS, W Yorkshire, England
[6] Univ Montreal, Dept Pathol & Cell Biol, Montreal, PQ H3T 1J4, Canada
[7] Univ Montreal, Inst Res Immunol & Canc, Montreal, PQ H3T 1J4, Canada