Published on in Vol 9, No 12 (2020): December
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/17814, first published
.
1 MRC Epidemiology Unit, University of Cambridge, Cambridge, United Kingdom
2 Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya
3 Faculty of Education and Human Resources, Kisii University, Kisii, Kenya