Chersich M F, Swift C P, Edelstein I, Breetzke G, Scorgie F, Schutte F, Wright C Y
Wits RHI (Wits Reproductive Health and HIV Institute), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
S Afr Med J. 2019 Jun 28;109(7):447-449. doi: 10.7196/SAMJ.2019.v109i7.14134.