1. Division of Urology, Department of Surgery, Groote Schuur Hospital and University of Cape Town, Cape Town, South Africa.
2. Division of Urology, Department of Surgery, Frere Hospital and Walter Sisulu University, East London, South Africa.
3. Division of Clinical Pharmacology, Department of Medicine, University of Stellenbosch, Cape Town, South Africa.
4. Hillcrest Private Hospital, Durban, South Africa.
5. Department of Biotechnology and Bioprocess Engineering, Laboratory of Biomedical Engineering, Warsaw University of Technology, Warsaw, Poland.
6. Division of Neurosurgery, Department of Surgery, Groote Schuur Hospital and University of Cape Town, Cape Town, South Africa.