Received: 9 January 2019
Accepted: 18 May 2019
First Online: 28 May 2019
Ethics approval and consent to participate
: Ethical clearance was obtained from Institutional Review Board of Aksum University. During data collection, written consent was obtained from each parent and legal guardians after they were introduced the purpose and importance of the study. They were informed about their rights to interrupt the interview at any time. To ensure confidentiality, all of the study participants were assured that the data will be anonymous, name or any other personal identifiers will not be recorded and that was done accordingly.
: Not applicable.
: The authors declare that they have no competing interests.