Prioreschi, Alessandra http://orcid.org/0000-0002-6913-0706
Nappey, Thomas
Westgate, Kate
Olivier, Patrick
Brage, Soren
Micklesfield, Lisa Kim
Article History
Received: 4 August 2017
Accepted: 22 February 2018
First Online: 1 March 2018
Ethics approval and consent to participate
: Ethical approval was obtained from the Human Research Ethics Committee of the University of the Witwatersrand (ethics number M150632). All participants gave written and informed consent for participation in this study.
: Not applicable.
: The authors declare that they have no competing interests
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