About the Authors

Kimberly B. Fortner

Affiliation Division Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Vanderbilt University Medical Center, Vanderbilt University, Nashville, Tennessee, United States of America

Chad A. Grotegut

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

Carla E. Ransom

Affiliation Division Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Vanderbilt University Medical Center, Vanderbilt University, Nashville, Tennessee, United States of America

Rex C. Bentley

Affiliation Department of Pathology, Duke University Hospital, Duke University, Durham, North Carolina, United States of America

Liping Feng

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

Lan Lan

Affiliation Department of Biostatistics, Duke University Hospital, Duke University, Durham, North Carolina, United States of America

R. Phillips Heine

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

Patrick C. Seed

Affiliation Division of Infectious Diseases, Department of Pediatrics, Duke University Hospital and Department of Molecular Genetics and Microbiology, Duke University, Durham, North Carolina, United States of America

Amy P. Murtha

amy.murtha@dm.duke.edu

Affiliation Division Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Duke University Medical Center, 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: KBF CER LF CAG RPH PCS APM. Performed the experiments: KBF CER LF APM. Analyzed the data: KBF APM LL. Contributed reagents/materials/analysis tools: CAG PCS RPH LF APM. Wrote the paper: KBF APM CAG. Reviewed microscope images: KBF CER. Edited the manuscript: CAG CER RPH LF LL PCS RCB.