Funding for this research was provided by:
National Research Foundation (N00591, N00375, N00903, N01716)
Cancer Association of South Africa (AOV741, AOW228)
Article History
Received: 23 May 2019
Accepted: 27 August 2019
First Online: 31 August 2019
Compliance with ethical standards
:
: The authors declare no conflict of interest.