About the Authors

Teferi Abegaz

teferiabegaz@gmail.com

Affiliation School of Public and Environmental Health, College of Medicine and Health Sciences, Hawassa University, Hawassa, Ethiopia

Yemane Berhane

Affiliation Addis Continental Institute of Public Health, Addis Ababa, Ethiopia

Alemayehu Worku

Affiliation School of Public Health, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia

Abebe Assrat

Affiliation Ministry of Transport, Addis Ababa, Ethiopia

Abebayehu Assefa

Affiliation World Health Organization (WHO) Ethiopia, Addis Ababa, Ethiopia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TA YB AW A. Assrat A. Assefa. Performed the experiments: TA. Analyzed the data: TA. Wrote the paper: TA YB AW A. Assrat A. Assefa. Assisting the experiments: YB AW. Principal investigator: TA.