1. Department of Applied Mathematics, School of MathematicsSchool of Molecular and Cellular Biology, University of Leeds, LS2 9JT Leeds, UK
2. Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY, USA
3. Quantitative Biology, Discovery Sciences, IMED Biotech Unit, AstraZeneca, Cambridge Science Park, Milton Road, CB4 0WG Cambridge, UK
4. Endothelial Cell Biology Unit, School of Molecular and Cellular Biology, University of Leeds, LS2 9JT Leeds, UK