Text and Data Mining valid from 2019-04-27
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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