Funding for this research was provided by:
College of Medicine and Health Sciences, University of Gondar (official paper)
Received: 19 September 2018
Accepted: 26 February 2020
First Online: 12 March 2020
Ethics approval and consent to participate
: Ethical clearance was obtained from Gondar University Research and Community Service Vise – President and Amhara Regional Health Buiro after proposal was reviewed by ethical review board of the University. The Amhara regional and Gondar Zone health offices acknowledged the research and provided approval to conduct the research.
: The author consents to Editorial Board of the journal BMC to publish the paper. The authors accept responsibility for publishing this material in his own name, if any.
: The author declares that he has no competing interests.