1. Department of Urology, Medway Maritime Hospital, Kent, United Kingdom
2. Department of Urology Glangwili Hospital, Wales, United Kingdom
3. Department of Urology, Oxford University Hospitals, Oxford, United Kingdom
4. Department of Urology and Nephrology, Darent Valley Hospital, Dartford, United Kingdom
5. Institute of Medical Sciences, Canterbury Christchurch University, Canterbury, United Kingdom