Received: 4 October 2019
Accepted: 11 December 2019
First Online: 13 January 2020
Ethics approval and consent to participate
: The protocol of this study was reviewed by Faculty Research Committee and approved by the Research Ethics Committee (REC) of Mbarara University of Science and Technology, Uganda. It was also registered with Uganda National Council for Science and Technology (UNCST) with reference number HS398ES.
: Not applicable.
: The authors declare that they have no competing interests.