Funding for this research was provided by:
College of Medicine and Health Sciences, University of Gondar ($78.125)
Received: 6 December 2019
Accepted: 15 May 2020
First Online: 27 May 2020
Ethics approval and consent to participate
: Ethical clearance was obtained from Ethical and Review Committee of School of Biomedical and Laboratory Sciences, College of Medicine and Health Sciences University of Gondar, Ethiopia. A permission and support letters were also obtained from Zonal Health bureau and District Health Office. Parents/guardians had provided a written informed consent on behalf of any participants under the age of 16. Thumbprint was also taken from each parent/guardian who was unable to read and write after having been read the full informed consent form by a data collector. Besides, verbal assent was sought from each participant.
: Not applicable.
: The authors declare that they have no competing interests.