Chersich M F, Scorgie F, Rees H, Wright C Y
Wits Reproductive Health and HIV Institute, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
S Afr Med J. 2018 May 25;108(6):453-454. doi: 10.7196/SAMJ.2018.v108i6.13274.