1. Section of Hepatology and Gastroenterology, Department of Medicine, Medical School Building, Imperial College London, London W2 1PG, UK.
2. Cell Signaling Section, Division of Immunology, Department of Pathology, Tennis Court Road, University of Cambridge, Cambridge CB2 1QP, UK.
3. Division of Cell and Molecular Biology, Sir Alexander Fleming Building, Imperial College London, London SW7 2AZ, UK.
4. Department of Physics, Imperial College London, London SW7 2AZ, UK.
5. Cambridge Institute for Medical Research, Addenbrookes Hospital, Hills Road, Cambridge CB2 0XY, UK.