About the Authors

Katharine J. Looker

katharine.looker@bristol.ac.uk

Affiliation School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

Amalia S. Magaret

Affiliation Department of Laboratory Medicine, University of Washington, Seattle, Washington, United States of America

Margaret T. May

Affiliation School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

Katherine M. E. Turner

Affiliation School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

Peter Vickerman

Affiliation School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

Sami L. Gottlieb

Affiliation Department of Reproductive Health and Research, World Health Organization, Geneva, Switzerland

Lori M. Newman

Affiliation Department of Reproductive Health and Research, World Health Organization, Geneva, Switzerland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KJL LMN. Performed the experiments: KJL. Analyzed the data: KJL ASM MTM KMET PV SLG LMN. Contributed reagents/materials/analysis tools: KJL ASM MTM KMET PV. Wrote the paper: KJL ASM MTM KMET PV SLG LMN. Contributed to the ongoing progress and direction of the research: KJL ASM MTM KMET PV SLG LMN. Provided technical expertise and input: KJL ASM MTM KMET PV SLG LMN.