Funding for this research was provided by:
Sefako Makgatho Health Sciences University. (not applicable)
Text and Data Mining valid from 2019-08-22
Received: 22 March 2019
Accepted: 19 August 2019
First Online: 22 August 2019
Ethics approval and consent to participate
: Permission for this study and ethical approval was granted by the Sefako Makgatho Health Sciences University Research and Ethics Committee (SMUREC) (project number: MREC/M/09/2011:PG). Written information about the study was provided to the self-declared healthy volunteers, and each volunteer provided informed consent.
: Written informed consent was obtained from the volunteers for the publication of the findings of this study. A copy of the written consent is available for review by the Editor of this journal.
: The authors declare that they have no competing interests.