About the Authors
Centre for International Health, University of Bergen, Bergen, Norway
Southern Nations, Nationalities, and Peoples' Regional Health Bureau, Awassa, Ethiopia
The authors have declared that no competing interests exist.
Conceived and designed the experiments: DGD BL. Performed the experiments: DGD. Analyzed the data: DGD BL. Wrote the paper: DGD BL. Supervised the conduct of the experiment: BL.