1. Dermatology Department; Nelson R Mandela School of Medicine; University of KwaZulu-Natal; Durban; South Africa
2. School of Chemistry and Physics; University of KwaZulu-Natal, Westville Campus; Durban; South Africa
3. Department of Pharmacy; Medunsa Campus, University of Limpopo; Pretoria; South Africa
4. School of Nursing and Community Health; Nelson R Mandela School of Medicine; University of KwaZulu-Natal; Durban; South Africa