Received: 11 February 2017
Accepted: 19 November 2017
First Online: 16 July 2018
Ethics approval and consent to participate
: Ethical clearance was first obtained from the Institutional Review Board (IRB) of the Institute of Public Health, College of Medicine and Health Sciences, University of Gondar. Official permission letter was obtained from Amhara Regional Health Bureau and Bahir Dar City Administration Heath Department and hospital and health centers administration offices. Finally, verbal consent was obtained from each study participant for their participation in the study after they were informed about the purpose and importance of the study and were informed about their right not to participate or withdraw from the study at any time.
: Not applicable.
: The authors declare that they have no competing interests.
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