Funding for this research was provided by:
Received: 23 February 2021
Accepted: 1 June 2021
First Online: 9 June 2021
: A research permit for the field study in Meki was not required. In Sile, a research permit was obtained from the institutional review board of the College of Natural and Computational Sciences, Addis Ababa University (CNSDO/284/08/2016), and Arba Minch Zuria District Health Office (AZWHO/1163/2).
: Not applicable.
: The authors declare that they have no competing interests.