1. Department of Nuclear Medicine, Netcare Umhlanga and Hibiscus Hospitals, KwaZulu Natal, South Africa
2. SGP Medical, Netcare Alberlito Hospital and Kwadukuza Private Hospital, Division of Internal Medicine, Nelson R. Mandela School of Medicine, University of KwaZulu Natal, KwaZulu Natal, South Africa
3. Lancet Laboratories, Durban, KwaZulu Natal, South Africa
4. Division of Nuclear Medicine, Tygerberg Hospital, Stellenbosch University, Western Cape, South Africa.