1 Haematopoietic Stem Cell Biology Laboratory, Medical Research Council (MRC) Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom.
2 MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, Medical Sciences Division, University of Oxford, Oxford, United Kingdom.
3 Dana-Farber Cancer Institute, Boston, MA, United States.
4 Clinical Research Development and Phase I Unit, ASST Spedali Civili di Brescia, Brescia, Italy.