Funding for this research was provided by:
South African Medical Research Council
Text and Data Mining valid from 2018-09-29
Received: 21 May 2018
Accepted: 27 August 2018
First Online: 29 September 2018
Ethics approval and consent to participate
: Approval was provided by the Medical Research Council Human Research Ethics Committee (EC002–2/2014), Stellenbosch University Health Research Committee (N14/02/008) and the University of South Australia Human Research Ethics Committee (0000034923). Written consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.
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