Funding for this research was provided by:
Bill and Melinda Gates Foundation
Eunice Kennedy Shriver National Institute of Child Health and Human Development (T32HD007168, P2CHD050924)
Received: 2 December 2019
Accepted: 2 June 2020
First Online: 8 June 2020
Ethics approval and consent to participate
: This research was ethically approved by Addis Ababa University’s Institutional Review Board and the University of North Carolina at Chapel Hill’s Institutional Review Board. Review boards deemed this research non-human subjects, thus informed consent is not applicable and was' waived by the both aforementioned IRBs.
: Not applicable.
: We declare no competing interests.