1 Leeds Cancer Centre, St James's University Hospital, Leeds Teaching Hospitals NHS Trust, Leeds, UK.
2 Cancer Sciences Academic Unit, University of Southampton, Somers Cancer Sciences Building, Southampton General Hospital, Southampton, UK.
3 University of Bristol, Bristol, UK.
4 Oncology Centre, CRUK Cambridge Centre, University of Cambridge, Cambridge, UK.
5 Institute of Translational Medicine, Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, UK; The Clatterbridge Cancer Centre NHS Foundation Trust, Wirral, UK.
6 University of Birmingham, Birmingham, UK.
7 Cancer Sciences Academic Unit, University of Southampton, Somers Cancer Sciences Building, Southampton General Hospital, Southampton, UK. Electronic address: E.Copson@soton.ac.uk.