Funding for this research was provided by:
National Research Foundation (93541)
Article History
Received: 29 March 2018
Accepted: 4 November 2018
First Online: 19 November 2018
Compliance with ethical standards
: Ethical clearance for this study was granted by the University of Cape Town Human Research Ethics Committee (approval number: 317/2017). This study was conducted in accordance with the Declaration of Helsinki (last updated in 2013) and International guidelines for Good Clinical Practice (ICH 1997).
: The authors declare that they have no conflict of interest.