1. Department of Biochemistry, School of Life Sciences, University of KwaZulu-Natal, Durban, South Africa
2. Faculty of Health Sciences, Laser Research Centre, University of Johannesburg, Doornfontein, South Africa
3. Department of Pharmacology, University of the Free State, Bloemfontein, South Africa
4. Department of Pure and Industrial Chemistry, Faculty of Physical Sciences, University of Nigeria, Nsukka, Nigeria
5. School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa