Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (031A247A)
Received: 15 August 2018
Accepted: 7 May 2019
First Online: 3 June 2019
Ethics approval and consent to participate
: Ethical clearance was obtained from the Research and Ethical Review Board of Jimma University. Permission to undertake the study was obtained from every relevant authority in Jimma Zone. Each study participant was briefed about the study and offered the opportunity to ask questions. Then oral informed consent was obtained from each participant prior to participation in the study and data was kept confidential. The Ethical Review Board decided to have oral consent as the study was not intervention. In addition, the data collection and consent process were randomly checked by the Ethical Review Board to ensure the ethical undertaking of the research.
: Not applicable.
: The authors declare that they have no competing interests.
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