Funding for this research was provided by:
Cancer Association of South Africa
National Research Foundation
Received: 8 May 2017
Accepted: 26 March 2018
First Online: 4 April 2018
Ethics approval and consent to participate
: Ethical approval was obtained from the Human Research Ethics Committee of Stellenbosch University (protocol number N13/04/052), and this study was conducted to meet the standards of the Declaration of Helsinki. Written informed consent was obtained from all volunteering participants based on inclusion criteria. Participants were informed that they could withdraw at any time point, and were assured of their anonymity and confidentiality within the study.
: No individual’ data were used; only group data were reported, thus not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.