Text and Data Mining valid from 2020-02-10
Received: 17 December 2019
Accepted: 5 February 2020
First Online: 10 February 2020
Ethics approval and consent to participate
: Not applicable.
: No identifying patient details are contained within this manuscript by adhering to the South African Copyright Law (COPYRIGHT ACT NO. 98 OF 1978, section 21).
: The authors declare that they have no competing interests.