1. Department of Urology, Bristol Urological Institute, Southmead Hospital, Bristol, UK
2. Department of Pathology, Southend University Hospital, Westcliff-on-Sea, Essex, UK
3. Department of Urology, Southend University Hospital, Westcliff-on-Sea, Essex, UK
4. Department of Radiology, Southend University Hospital, Westcliff-on-Sea, Essex, UK