Funding for this research was provided by:
ELMA Foundation (N/A)
Received: 24 August 2019
Accepted: 17 June 2020
First Online: 29 June 2020
Ethics approval and consent to participate
: This longitudinal prospective cohort study was conducted with approval of the Institutional Review Boards of Stellenbosch University (N12/08/046). Permission for the recruitment to occur in government health facilities was granted by the Eastern Cape Department of Health. All procedures performed in studies involving human participants were in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Written informed consent was obtained from all participants prior to participation in the study.
: Not applicable.
: The authors declare that they have no competing interests.