1Cancer Genome Project, Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
2Institute of Cancer Research, 15 Cotswold Road, Sutton, Surrey SM2 5NG, UK
3Department of Haematology, University of Cambridge, Cambridge CB2 2XY, UK
Correspondence and requests for materials should be addressed to M.R.S. ([email protected]).
Acknowledgements We would like to thank N. Rahman for comments on the manuscript, G. Tang and B. Barrell for contributions to the figures and the Kay Kendall Leukaemia Fund and the Wellcome Trust for support.