1. Division of Surgery and Interventional Science; University College London; London UK
2. Department of Urology; University College London Hospitals NHS Foundation Trust; London UK
3. Department of Radiation Oncology; University Medical Centre Utrecht; Utrecht The Netherlands
4. Department of Urology; Hampshire Hospitals NHS Foundation Trust; Basingstoke UK
5. Division of Surgery; Department of Surgery and Cancer; Faculty of Medicine; Imperial College London; London UK