[1] Charles Univ Prague, Fac Med 2, Dept Paediat Haematol & Oncol, Prague, Czech Republic
[2] Univ Minnesota, Dept Pediat, Div Blood & Marrow Transplantat, Minneapolis, MN 55455 USA
[3] CLIP, Prague, Czech Republic
[4] Univ Minnesota, Stem Cell Inst, Minneapolis, MN USA
[5] Univ Minnesota, Ctr Genome Engn, Minneapolis, MN USA