About the Authors

Chad A. Grotegut

chad.grotegut@duke.edu

Affiliation Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Duke University, Durham, North Carolina, United States of America

Christian A. Chisholm

Affiliation Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Virginia, Charlottesville, Virginia, United States of America

Lauren N. C. Johnson

Affiliation Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

Haywood L. Brown

Affiliation Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Duke University, Durham, North Carolina, United States of America

R. Phillips Heine

Affiliation Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Duke University, Durham, North Carolina, United States of America

Andra H. James

Affiliation Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Virginia, Charlottesville, Virginia, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CAG AHJ. Analyzed the data: CAG CAC AHJ. Contributed reagents/materials/analysis tools: CAG HLB RPH AHJ. Wrote the paper: CAG CAC LNCJ HLB RPH AHJ.