Received: 4 April 2018
Accepted: 23 January 2019
First Online: 6 February 2019
Ethics approval and consent to participate
: Administrative and ethical approval has been granted by the Asmara College of Health Sciences research ethical clearance committee and Ministry of health - health research proposal review and ethical clearance committee. Study participants were informed about the objective of the study and written informed consent was obtained from each respondent. All the information obtained was and will be held confidential and it was and will be used only for this study’s purpose.
: Not applicable.
: The authors declare that they have no competing interests.
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