1. Analytical Signalling Group, Centre for Cell Signalling, Barts Cancer Institute, Queen Mary University of London, London EC1B 6BQ, UK.
2. AstraZeneca, Macclesfield, Cheshire SK10 2NA, UK.
3. Cell Signalling Group, Centre for Cell Signalling, Barts Cancer Institute, Queen Mary University of London, London EC1B 6BQ, UK.
4. Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London EC1B 6BQ, UK.