Funding for this research was provided by:
College of Medicine and Health Sciences, University of Gondar (Uog/11/027)
Received: 12 June 2019
Accepted: 10 August 2019
First Online: 15 August 2019
Ethics approval and consent to participate
: Ethical clearance of this study was obtained from Ethical Review Board of University of Gondar with the protocol number of GCMH71/2017. Written informed consent was also taken from each study participant.
: Not applicable.
: Authors declare that they have no conflict of interest.