[1] Wellcome Sanger Inst, Hinxton, England
[2] Wellcome MRC Cambridge Stem Cell Inst, Cambridge, England
[3] Cambridge Univ Hosp NHS Fdn Trust, Dept Haematol, Cambridge, England
[4] Univ Cambridge, Natl Inst Hlth Res, Blood & Transplant Res Unit Donor Hlth & Gen, Cambridge, England
[5] AOU Careggi, Centro Ric & Innovazione Malattie Mieloproliferat, Florence, Italy
[6] Univ Florence, Dept Expt & Clin Med, Florence, Italy
[7] Guys & St Thomas NHS Fdn Trust, London, England
[8] Cambridge Univ Hosp NHS Trust, Cambridge, England
[9] Univ Cambridge, Wellcome MRC Cambridge Stem Cell Inst, Cambridge, England
[10] Imperial Coll London, London, England
[11] Wellcome Trust Sanger Inst, Wellcome Trust Genome Campus, Cambridge, England
[12] Human Technopole, Milan, Italy