Funding for this research was provided by:
SADC HIV and AIDS Special Fund (111)
First Online: 15 February 2019
Compliance with Ethical Standards
: All authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Study procedures were approved by the University of KwaZulu-Natal Institutional Review Board (BFC483/14) and by national ethical committees (Medical Research Council of Zimbabwe and National Health Bioethics Committee for Mozambique) in each of the three countries.
: Informed consent was obtained from all individual participants included in the study.