1 Division of Surgery, Department of Surgery and Cancer, Imperial College London, Charing Cross Campus, London, UK; Department of Urology, Imperial College Healthcare NHS Trust, Charing Cross Hospital, London, UK. Electronic address: m.connor@imperial.ac.uk.
2 Department of Clinical Oncology, The Royal Marsden NHS Foundation and Institute of Cancer Research, London, UK.
3 Health Economics Research Unit, Faculty of Medicine, University of Aberdeen, Aberdeen, UK.
4 Division of Surgery, Department of Surgery and Cancer, Imperial College London, Charing Cross Campus, London, UK; Department of Urology, Imperial College Healthcare NHS Trust, Charing Cross Hospital, London, UK.