Funding for this research was provided by:
Grand Challenges Canada (0677-01-10)
Received: 25 January 2019
Accepted: 3 July 2019
First Online: 8 July 2019
Ethics approval and consent to participate
: Ethical approval was obtained from the Catholic University of Health and Allied Sciences/Bugando Medical Centre and from the Medical Research Coordinating Committee of the National Institute for Medical Research, Tanzania (NIMR/HQ/R.8a/Vol.IX/1936). Permission to conduct this study was given by Kilosa District Council Authority.
: Not applicable.
: The authors declare that they have no competing interests.