Funding for this research was provided by:
South African Medical Research Council (131122)
Received: 8 April 2016
Accepted: 11 January 2018
First Online: 29 January 2018
Ethics approval and consent to participate
: Ethical approval was provided by the three participating organisations in the Flagship grant: Medical Research Council (EC002–2/2014), Stellenbosch University (N14/02/008) and University of South Australia (0000034923). Written consent forms were obtained from the participants in this study.
: Not applicable.
: The authors declare they have no competing interests.
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