1. Wellcome Trust Centre for Stem Cell Research and MRC Centre for Stem Cell Biology and Regenerative Medicine, University of Cambridge; Cambridge UK
2. EMBL European Bioinformatics Institute; Cambridge UK
3. Cancer Research Center, Chaim Sheba Medical Center; Tel Hashomer Israel
4. Cancer Research UK, Cambridge Research Institute, Li Ka Shing Centre; Cambridge UK
5. London Research Institute, Lincoln's Inn Fields Laboratories; London UK
6. Genome Biology and Developmental Biology Units, EMBL; Heidelberg Germany
7. Department of Biochemistry, University of Cambridge; Cambridge UK