Funding for this research was provided by:
Bahir Dar University (2016/2)
Received: 18 September 2018
Accepted: 26 March 2019
First Online: 7 June 2019
Ethics approval and consent to participate
: Ethical clearance was obtained from Ethical Review Committee of college of medicine and health sciences, Bahir Dar University. Written consent taken from the participants.
: Not applicable.
: The authors declare that they have no competing interests.
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