About the Authors

Wendy Prudhomme O'Meara

To whom correspondence should be addressed: E-mail: prudhomw@mail.nih.gov

Affiliation Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America

David L Smith

Affiliation Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America

F. Ellis McKenzie

Affiliation Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

WPO, DLS, and FEM designed the study. WPO analyzed the data. WPO, DLS, and FEM contributed to writing the paper.