Received: 21 November 2020
Accepted: 4 February 2021
First Online: 12 February 2021
Ethics approval and consent to participate
: Ethics approval for the study was granted by the Institutional Review Board (IRB) of the Ethiopian Public Health Institute (EPHI). Written informed consent was obtained from parents or guardians prior to recruitment.
: Not applicable.
: The authors declare that they have no competing interests.