1. Department of Urology, Frere Hospital, Walter Sisulu University, East London 5200, South Africa
2. Department of Paediatrics, Frere Hospital, Walter Sisulu University, East London, South Africa
3. Division of Anatomical Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
4. National Health Laboratory Service, Groote Schuur Hospital, Cape Town, South Africa
5. Department of Urology, Frere Hospital, Walter Sisulu University, East London, South Africa
6. Department of Urology, Groote Schuur Hospital, University of Cape Town, Cape Town, South Africa