[1] Univ Cambridge, Wellcome Trust MRC Stem Cell Inst, Cambridge Inst Med Res, Cambridge, England
[2] Univ Cambridge, Dept Haematol, Cambridge, England
[3] Wellcome Trust Sanger Inst, Cambridge, England
[4] Cambridge Univ Hosp NHS Fdn Trust, Cambridge, England
[5] German Collect Microorganisms & Cell Cultures, Leibniz Inst DSMZ, Braunschweig, Germany