Received: 24 October 2019
Accepted: 2 August 2020
First Online: 8 August 2020
Ethics approval and consent to participate
: Ethical clearance was obtained from the Institutional Review Board of the Institute of Public Health, College of Medicine and Health Sciences, the University of Gondar (Reference/number-- Institute of Public Health/2493). A letter of permission was obtained from the Amhara Regional State Health Bureau to Borumeda and Debremarkos referral hospitals (Ref/no H/R/T/T1/638/09).
: Not applicable.
: The authors declare that they have no competing interests.