1. Molecular Sciences Institute, School of Chemistry University of the Witwatersrand Johannesburg South Africa
2. Faculty of Health Sciences WITS Research Institute for Malaria (WRIM), University of the Witwatersrand Johannesburg South Africa
3. Pharmacology Division, Department of Pharmacy and Pharmacology, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
4. Department of Biochemistry and Microbiology Rhodes University Grahamstown South Africa