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Article History

Received: 22 September 2017

Accepted: 8 February 2018

First Online: 5 March 2018

Ethics approval and consent to participate

: Ethical approval and clearance was obtained from Institutional Review Board of Bahir Dar University. After clearly explaining the objective of the study, written consent was taken from each participant before conducting the interview and measurements. Data were kept confidential.

: The authors declare that they have no competing interests.

: Not applicable.

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