1. Division of Surgery and Interventional Science; University College Hospitals NHS Foundation Trust; London UK
2. Department of Urology; University College Hospitals NHS Foundation Trust; London UK
3. Department of Urology; Centre Hospitalier Universitaire Vaudois; Lausanne Switzerland
4. Department of Health Services Research and Policy; London School of Hygiene and Tropical Medicine; London UK
5. Department of Histopathology; University College Hospitals NHS Foundation Trust; London UK
6. Department of Urology; Royal Free Hospital NHS Trust; London UK