About the Authors
Yale School of Public Health, New Haven, Connecticut, United States of America
Instituto Nacional de Salud, Bogota, Colombia
The authors have declared that no competing interests exist.
Conceived and designed the experiments: HP FC DD MDW AG. Performed the experiments: HP FC DD. Analyzed the data: HP. Contributed reagents/materials/analysis tools: HP MDW AG. Wrote the paper: HP DD MDW AG.