Article History
Received: 7 December 2017
Accepted: 21 January 2020
First Online: 30 January 2020
Ethics approval and consent to participate
: The study protocol was approved by the Addis Ababa University, College of Health and Medical Sciences, Institutional Health Research Ethics Review Committee. Official letters of co-operation was written to all hospitals and concerned bodies to obtain their co-operation in facilitating the study. Information on the study was explained to the participants, including the procedures, potential risks and benefits of the study. Informed voluntary written and signed consent were obtained from all respondents prior to the study.
: Not applicable.
: The authors declare that they have no competing interests.