1. Department of Human Biology, Faculty of Health Sciences, Walter Sisulu University, p/bag x1,NMD Campus, Mthatha5117, South Africa
2. Department of Chemistry, Faculty of Science and Agriculture, University of Fort Hare, Alice, 5700, South Africa
3. Traditional Healer, Lusikisiki, Eastern Cape, South Africa
4. Department of Physiology, Walter Sisulu University, Mthatha5117, South Africa