1. South African Herbal Science and Medicine Institute (SAHSMI), Faculty of Natural Sciences, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa
2. South African Herbal Science and Medicine Institute, University of the Western Cape, Bellville 7535, South Africa
3. The South African Centre for Epidemiological Modelling and Analysis, Stellenbosch University, Stellenbosch 7602, South Africa
4. International Centre for Reproductive Health (ICRH), Ghent University, De Pintelaan 185 UZP114, 9000 Gent, Belgium
5. School of Pharmacy, University of the Western Cape, Bellville 7535, South Africa
6. School of Public Health, University of the Western Cape, Bellville 7535, South Africa