About the Authors

Ana Clara Zoni

Contributed equally to this work with: Ana Clara Zoni, Laura Catalá, Steven K. Ault

Affiliation Independent consultant, Madrid, Spain

Laura Catalá

Contributed equally to this work with: Ana Clara Zoni, Laura Catalá, Steven K. Ault

lcatalap@gmail.com; catalal@paho.org

Affiliation Pan American Health Organization/World Health Organization, Washington, D.C., United States of America

Steven K. Ault

Contributed equally to this work with: Ana Clara Zoni, Laura Catalá, Steven K. Ault

Affiliation Pan American Health Organization/World Health Organization, Washington, D.C., United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ACZ LC SKA. Performed the experiments: ACZ LC. Analyzed the data: ACZ LC. Contributed reagents/materials/analysis tools: ACZ LC. Wrote the paper: ACZ LC SKA. Wrote the protocol of the systematic review, built the database, compiled and reviewed the studies selected for the systematic review, drafted the article: LC ACZ.