[1] Univ Oxford, Weatherall Inst Mol Med, MRC Mol Hematol Unit, Oxford, England
[2] Univ Edinburgh, Inst Stem Cell Res, Edinburgh, Midlothian, Scotland
[3] Univ Oxford, Weatherall Inst Mol Med, Haematopoiet Stem Cell Lab, Oxford, England
[4] EMBL Mouse Biol Program, Monterotondo, Italy
[5] Lund Univ, Div Mol Hematol, Lund, Sweden