1. Bristol Urological InstituteSouthmead Hospital Bristol UK
2. Bristol Randomised Trials Collaboration (BRTC), Bristol Trials CentreUniversity of Bristol Bristol UK
3. Population Health Sciences, Bristol Medical SchoolUniversity of Bristol Bristol UK
4. Urology DepartmentFreeman Hospital Newcastle upon Tyne UK
5. Urology DepartmentAddenbrooke's Hospital Cambridge UK
6. Translational Health Sciences, Bristol Medical SchoolUniversity of Bristol Bristol UK