Received: 5 February 2019
Accepted: 5 July 2019
First Online: 17 July 2019
Ethics approval and consent to participate
: Ethical clearance was obtained from the Institutional Review Board of Institute of Health, Jimma University. The purpose and objective of the study were described to the participants and written consent was obtained from the study participants. All participant information obtained in the course of the study was kept confidential.
: Not applicable.
: The authors declare that they have no competing interests.