About the Authors

Corinne H. Rocca

roccac@obgyn.ucsf.edu

Affiliation Advancing Standards in Reproductive Health (ANSIRH), Bixby Center for Global Reproductive Health, Department of Obstetrics, Gynecology and Reproductive Sciences, School of Medicine, University of California San Francisco, San Francisco, California, United States of America

Katrina Kimport

Affiliation Advancing Standards in Reproductive Health (ANSIRH), Bixby Center for Global Reproductive Health, Department of Obstetrics, Gynecology and Reproductive Sciences, School of Medicine, University of California San Francisco, San Francisco, California, United States of America

Sarah C. M. Roberts

Affiliation Advancing Standards in Reproductive Health (ANSIRH), Bixby Center for Global Reproductive Health, Department of Obstetrics, Gynecology and Reproductive Sciences, School of Medicine, University of California San Francisco, San Francisco, California, United States of America

Heather Gould

Affiliation Advancing Standards in Reproductive Health (ANSIRH), Bixby Center for Global Reproductive Health, Department of Obstetrics, Gynecology and Reproductive Sciences, School of Medicine, University of California San Francisco, San Francisco, California, United States of America

John Neuhaus

Affiliation Division of Biostatistics, Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California, United States of America

Diana G. Foster

Affiliation Advancing Standards in Reproductive Health (ANSIRH), Bixby Center for Global Reproductive Health, Department of Obstetrics, Gynecology and Reproductive Sciences, School of Medicine, University of California San Francisco, San Francisco, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DGF. Performed the experiments: DGF HG. Analyzed the data: CHR. Contributed reagents/materials/analysis tools: CHR SCMR JN DGF. Wrote the paper: CHR KK SCMR HG JN DGF. Served as PI: DGF. Interpreted results: CHR KK SCMR DGF. Provided statistical support: JN.