Received: 9 November 2020
Accepted: 17 October 2021
First Online: 30 October 2021
: Ethical clearance and letter of cooperation was obtained from the institutional review board of the University of Gondar with reference number of IPH/160/05/2011. Then, permission letters from officials of University of Gondar Comprehensive Specialized Hospital, Department of Internal Medicine were processed before data collection. No personal identifiers, such as name, address and no private information was collected. Confidentiality during all phases of research activities was kept and data was held on secured password protected system.
: Not applicable.
: The authors have declared that no competing interests exist.