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Article History

Received: 4 March 2016

Accepted: 11 May 2018

First Online: 30 May 2018

Ethics approval and consent to participate

: The School of Public Health, Addis Ababa University (AAU), research ethical review committee was approved the Ethical clearance. An official letter of support was obtained from Addis Ababa University. Then, a written consent obtained from respondents above 18 years old and from the parents/guardians for those whose age less than 18 years old females and the information were kept confidential.

: The authors declare that they have no competing interests.

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