Received: 3 June 2019
Accepted: 10 October 2019
First Online: 26 October 2019
Ethics approval and consent to participate
: The study was reviewed and approved by the research committee of health Science College of Aksum University. Consent also obtained from educational office of the town and further from directors of each school. The objective and important of the study was explained to the study participants. Moreover, Respondents were assured of Information provided and giving the choice not to participate in the study. Data were collected after full informed written consent/assent was obtained from each study subjects/when age was less than 16 years old, it obtained from parents/legal guardian. In order to keep confidentiality of the data, name was not included.
: Not applicable.
: This manuscript maintains no competing financial interest declaration from any person or Organization or non-financial competing interests such as political, personal, religious, ideological, academic, intellectual, commercial or any other.