1. Department of Biomedical and Clinical Technology, Faculty of Health Sciences, Durban University of Technology, Durban, South Africa
2. Department of Medical Microbiology, School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
3. Epidemiology and Strategic Information Unit, HIV/AIDS, STI and TB (HAST), Human Sciences Research Council, Durban, South Africa
4. Department of Food and Nutrition, Faculty of Applied Sciences, Durban University of Technology, Durban, South Africa
5. Department of Biomedical Sciences, Faculty of Natural Sciences, Mangosuthu University of Technology, Durban, South Africa