Nigatu, Araya Mesfin
Gelaye, Kassahun Alemu
Article History
Received: 15 March 2019
Accepted: 14 October 2019
First Online: 7 November 2019
Ethics approval and consent to participate
: Ethical clearance was obtained from University of Gondar Institution Review Board (IRB) and written informed consent was held to each study participants. In addition, the benefits and risks of the study were informed.
: The authors declare that they have no competing interests.