Funding for this research was provided by:
Received: 1 June 2018
Accepted: 17 January 2019
First Online: 24 January 2019
Ethics approval and consent to participate
: Ethics approval was obtained from the Research Ethics Committees at the University of Pretoria (29/2015), the Western Cape Provincial Government (HSS/270/015PGD), University of Cape Town (761/2014) and Stellenbosch University (N13/05/063).Written consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.
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