[1] Maine Med Ctr, Res Inst, Scarborough, ME 04074 USA
[2] Harvard Univ, Sch Med, Massachusetts Gen Hosp, Ctr Regenerat Med, Boston, MA 02114 USA
[3] Harvard Univ, Sch Med, Massachusetts Gen Hosp, Dept Radiat Oncol,Edwin L Steele Lab, Boston, MA 02114 USA
[4] Harvard Mit Div Hlth Sci & Technol, Cambridge, MA 02139 USA
[5] Fudan Univ, Shanghai Huashan Hosp, Dept Hematol, Shanghai 200040, Peoples R China
[6] Harvard Univ, Stem Cell Inst, Cambridge, MA 02138 USA