About the Authors
- Christa L. Fischer Walker, David Sack, Robert E. Black
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: CLFW REB. Performed the experiments: CLFW. Analyzed the data: CLFW DS. Contributed reagents/materials/analysis tools: DS. Wrote the paper: CLFW REB.