About the Authors

Daniel Westreich

djw@unc.edu

Affiliations Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America, Department of Obstetrics and Gynecology, Duke University, Durham, North Carolina, United States of America, Duke Global Health Institute, Duke University, Durham, North Carolina, United States of America

Molly Rosenberg

Affiliation Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America

Sheree Schwartz

Affiliation Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America

Geeta Swamy

Affiliation Department of Obstetrics and Gynecology, Duke University, Durham, North Carolina, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DW MR GS. Performed the experiments: DW MR SS. Analyzed the data: DW. Contributed reagents/materials/analysis tools: DW MR SS. Wrote the manuscript: DW MR SS GS. Originated the paper, framed questions and review strategy, oversaw literature review conducted by MR and SS, conducted some literature review and data abstraction, led writing of paper: DW. Had full access to all the data in the study and has final responsibility for the decision to submit for publication: DW. Helped frame the questions and review strategy, conducted the literature review, abstracted data, helped write and edit the paper, and created figures: MR SS. Helped frame the questions and review strategy, and helped write and edit the paper: GS.