1. Optics and Imaging Centre, Doris Duke Medical Research Institute, University of KwaZulu-Natal, Durban, South Africa;
2. Third Department of Internal Medicine, University of Fukui Faculty of Medicine Sciences, Fukui, Japan;
3. Department of Obstetrics and Gynecology and Women’s Health and HIV Research Group, Nelson R Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa