Funding for this research was provided by:
National Research Foundation (TTK180416321158)
Received: 8 April 2019
Accepted: 5 August 2019
First Online: 14 August 2019
Ethics approval and consent to participate
: Informed consent was obtained from all individual participants included in the study. The study was approved by Stellenbosch University Health Research Ethics Committee (# S18/03/063) and The University of Cape Town Human Research Ethics Committee (744/2018) and permission was granted by the Western Cape Department of Health (WC_201806_029) to conduct the study at the proposed site. All procedures were in accordance with the ethical standards of the national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare that they have no competing interests.