Funding for this research was provided by:
University of free state (2016446920)
Text and Data Mining valid from 2019-11-06
Received: 14 March 2019
Accepted: 23 September 2019
First Online: 6 November 2019
Ethics approval and consent to participate
: Mt. Kenya University Ethical Review Committee (MKUERC) in Kenya, and Health Sciences Review Ethics Committee (HSREC), University of the Free State, South Africa. Ref No: MKU/ERC/0604 and UFS-HSD2017/1346.
: The authors declare that they have no competing interests.