Received: 12 July 2019
Accepted: 11 May 2020
First Online: 20 May 2020
Ethics approval and consent to participate
: An ethical clearance letter was obtained from the Departmental Research and Ethics Review Committee of school of biomedical laboratory science. The reference number of the ethical letter was “Ref no- SBMLS/2123/11”. This ethical letter was obtained from Mr. Mekonnen Girma (ExternalRef removed), Markos Negash (ExternalRef removed) and Bamilaku Enawgaw (ExternalRef removed). Written consent was obtained from participants and informed as their participation was voluntary. Study participants were also informed about the purpose of the study. Confidentiality was maintained at all levels of the study. In addition, study participants involvement was based on a voluntary basis and participants who were unwilling to take part in the study and those who need to quit their participation at any stage were informed to do so without any restriction. Consent to participate was obtained from the parents/guardians of study participants under the age of 16.
: All authors read the manuscript and have provided their consent to publish.
: The authors declare that they have no competing interest.