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Article History

Received: 18 August 2018

Accepted: 15 April 2019

First Online: 27 April 2019

Ethics approval and consent to participate

: Ethical clearance was obtained from College of Health science ethical review and research committee of Mekelle University. The data was collected after taking written informed consent; assent was taken from parents or guardians for those participants who were under the age of 16. All the data which was collected from the study participants and the information obtained was coded to maintain confidentiality.

: Not applicable.

: The authors declare that they have no competing interests.

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