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Article History

Received: 20 February 2018

Accepted: 25 June 2018

First Online: 9 July 2018

Ethics approval and consent to participate

: The study obtained ethical approval from Departmental Research and Ethics Review Committee (DRERC) of the Department of Medical Laboratory Sciences, Addis Ababa University (Protocol number: DRERC 092/14/MLS) and Institutional Review Board of St Paul’s Hospital Millennium Medical College. Informed written consent was obtained from each voluntary participant prior to enrolment.

: Not applicable.

: The authors declare that they have no competing interests.

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