Funding for this research was provided by:
Grand Challenges Canada (0739-05)
Received: 20 February 2019
Accepted: 5 August 2019
First Online: 14 August 2019
Ethics approval and consent to participate
: Ethical approval for this study was obtained from Maseno University Ethics Review Committee. All participants give informed consent prior to their inclusion in the study.
: Not applicable.
: The authors declare that they have no competing interests.