About the Authors

Ann K. Blanc


Affiliation Population Council, New York, New York, United States of America

William Winfrey

Affiliation Futures Institute, Glastonbury, Connecticut, United States of America

John Ross

Affiliation Futures Group, Senior Fellow, Washington, D.C., United States of America

Competing Interests

Co-author JR was an independent consultant and not affiliated with any institution until the study was completed. After the study was completed, he began working part time for Futures Group International. There are no patents, products in development or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: AB. Analyzed the data: WW. Wrote the paper: AB JR WW.