1 UCL Medical School, University College London, London, UK.
2 Specialist Centre For Kidney Cancer, Royal Free London NHS Foundation Trust, London, UK.
3 Department of Pathology, Royal Free London NHS Foundation Trust, London, UK.
4 Department of Radiology, Royal Free London NHS Foundation Trust, London, UK.
5 Royal Bournemouth and Christchurch Hospitals NHS Foundation Trust, Bournemouth, UK.
6 UCL Medical School, University College London, London, UK; Specialist Centre For Kidney Cancer, Royal Free London NHS Foundation Trust, London, UK. Electronic address: [email protected].