Received: 18 April 2019
Accepted: 4 September 2019
First Online: 9 September 2019
Ethics approval and consent to participate
: Ethical clearance and support letters were obtained from the Ethical Review Committee (ERC) of the School of Biomedical and Laboratory Sciences, University of Gondar. The support letter was submitted to the Gondar University referral hospital. Then, permission was obtained from the hospital director and department/section heads. Study participants were informed about the purpose and importance of the study through written informed concent before the data collection process. In addition, participants who were unwilling to take part in the study and those who need to quit their participation at any stage were informed to do so without any restriction.
: Not applicable.
: The authors declare that they have no competing interests.