1. Department of Urology , Oxford University Hospitals Trust, , Oxford, OX3 7LE , United Kingdom
2. University of Oxford , Oxford University Hospitals Trust, , Oxford, OX3 7LE , United Kingdom
3. Department of Surgery , Cambridge University Hospitals Trust, , Cambridge, CB2 0QQ , United Kingdom
4. University of Cambridge , Cambridge University Hospitals Trust, , Cambridge, CB2 0QQ , United Kingdom
5. Guy’s and St Thomas’ Hospital , London, SE1 7EH , United Kingdom
6. King’s College London , London, WC2R 2LS , United Kingdom
7. School of Clinical Medicine, University of Cambridge , Cambridge, CB2 0SP , United Kingdom
8. Paediatric Department, Norfolk and Norwich University Hospitals Foundation Trust , Norwich, NR4 7UY , United Kingdom
9. Institute of Continuing Education, University of Cambridge , Cambridge, CB23 8AQ , United Kingdom
10. Health Professions Education Unit, Hull York Medical School , York, YO10 5DD , United Kingdom
11. Department of Physiology , Development and Neuroscience, , Cambridge, CB2 3EL , United Kingdom
12. University of Cambridge , Development and Neuroscience, , Cambridge, CB2 3EL , United Kingdom