Document is current

Funding

: Yes, financial support of the Ministry of education, Addis Ababa University.

Conflicts of Interest

: No conflicts of interest to the best of our knowledge.

Ethical Approval and Consent to Participate

: No, the article does not require ethical approval and consent to participate with evidence.

Availability of Data and Material

: Not relevant.

Authors Contributions

: I am only the sole author of the article.