Ntlailane, Mmamolapo Getrude Lebogang http://orcid.org/0000-0003-0848-1323
Wichmann, Janine http://orcid.org/0000-0002-3008-3463
Article History
Received: 18 February 2019
Accepted: 2 July 2019
First Online: 31 July 2019
Compliance with ethical standards
: Approval to conduct the review was granted by the Research Ethics Committee (REC) of the Faculty of Health Sciences, University of Pretoria, reference number 234/2016.
: The authors declare that they have no conflict of interest.