Funding for this research was provided by:
National Research Foundation
Received: 13 December 2017
Accepted: 15 October 2018
First Online: 7 November 2018
Ethics approval and consent to participate
: This study was embedded in the REACH project and it upheld the ethical norms and standards established as part of the REACH project (ethical clearance Number: R14/49 Schneider). An endorsement letter to use REACH data was given by a Principal Investigator on the project. Ethical clearance (No: M150921) was sought and granted from the University of Witwatersrand Ethics Committee.
: Not applicable
: The authors declare that they have no competing interests.
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