Received: 8 August 2019
Accepted: 3 October 2019
First Online: 17 October 2019
Ethics approval and consent to participate
: Ethical clearance was obtained from the University of Gondar, College of medical and Health Sciences, Institutional Review Board. Informed written consent was obtained from each study participant prior to the interview.
: Not applicable.
: The authors declare that they have no competing interests.