About the Authors

Grace J. Chan

grace.chan@childrens.harvard.edu; gchan@jhsph.edu

Current address: Boston Children′s Hospital and Harvard School of Public Health, Boston, Massachusetts, United States of America

Affiliation Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America

Anne CC Lee

Affiliations Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America, Brigham and Women's Hospital, Boston, Massachusetts, United States of America

Abdullah H. Baqui

Affiliation Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America

Jingwen Tan

Affiliation Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America

Robert E. Black

Affiliation Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GJC ACL. Analyzed the data: GJC JT. Wrote the first draft of the manuscript: GJC. Contributed to the writing of the manuscript: GJC ACL AHB JT REB. ICMJE criteria for authorship read and met: GJC ACL AHB JT REB. Agree with manuscript results and conclusions: GJC ACL AHB JT REB.