1. Newcastle Medical School, Newcastle-upon-Tyne, England
2. Department of Urology, Freeman Hospital, Newcastle-upon-Tyne, England
3. Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Newcastle upon Tyne, England
4. Department of Urology, Churchill Hospital, Oxford, England
5. Nuffield Department of Surgery, Oxford University, Oxford, England
6. Department of Urology, University Hospital Southampton, Southampton, England