Received: 7 February 2019
Accepted: 9 July 2019
First Online: 15 July 2019
Ethics approval and consent to participate
: This research was conducted after obtaining ethical clearance from School of Biomedical and Laboratory Sciences of the University of Gondar ethical review committee with reference number SBMLS/625/09. Written informed consent was obtained from all adult patients. Children less than 18 years who are not able to give consent were also asked an assent and written consent was taken from their parents or legal guardian.
: Not applicable.
: The authors declare that they have no competing interests.