Funding for this research was provided by:
Arsi University (A/COHS/R/0010/15/16)
Received: 11 January 2019
Accepted: 5 June 2019
First Online: 18 June 2019
Ethics approval and consent to participate
: Ethics approval obtained from the Arsi University College of Health Sciences Ethics Review Board (A/COHS/R/0010/15/16). All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.