Funding for this research was provided by:
National Research Foundation (Unique Grant No. 99315)
Article History
First Online: 3 May 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in this study were in accordance with the ethical standards of the institution and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Ethical clearance was obtained from the Durban University of Technology Institutional Research Ethics Committee (IREC 084/16).
: Informed consent was obtained from all individual participants included in this study.