1 Sir William Dunn School of Pathology, University of Oxford, Oxford, UK.
2 Developmental Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
3 National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA.
4 MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK.
5 Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, University of Cambridge, Cambridge, UK.
6 European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Cambridge, UK.
7 Wellcome Sanger Institute, Cambridge, UK.
8 CRUK Cambridge Institute, University of Cambridge, Cambridge, UK.
9 MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK. marella.debruijn@imm.ox.ac.uk.
10 Sir William Dunn School of Pathology, University of Oxford, Oxford, UK. elizabeth.robertson@path.ox.ac.uk.