Received: 13 March 2020
Accepted: 23 June 2020
First Online: 6 July 2020
Ethics approval and consent to participate
: Ethical clearance was obtained from the Hawassa University, institutional review board with a reference number of IRB/058/10. Written consent was obtained from the study participants. The written consent to participate was also obtained from the parent or legal guardian of the children (ages 16 years old and below).
: Not applicable.
: The authors declare that they have no competing interests.