About the Authors

Brandon L. Guthrie

brguth@u.washington.edu

Affiliation Department of Epidemiology, University of Washington, Seattle, Washington, United States of America

James N. Kiarie

Affiliation Department of Obstetrics and Gynaecology, University of Nairobi, Nairobi, Kenya

Susan Morrison

Affiliations Department of Medicine, University of Washington, Seattle, Washington, United States of America, Department of Global Health, University of Washington, Seattle, Washington, United States of America

Grace C. John-Stewart

Affiliations Department of Epidemiology, University of Washington, Seattle, Washington, United States of America, Department of Medicine, University of Washington, Seattle, Washington, United States of America, Department of Global Health, University of Washington, Seattle, Washington, United States of America

John Kinuthia

Affiliation Department of Obstetrics and Gynaecology, University of Nairobi, Nairobi, Kenya

William L. H. Whittington

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

Carey Farquhar

Affiliations Department of Epidemiology, University of Washington, Seattle, Washington, United States of America, Department of Medicine, University of Washington, Seattle, Washington, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JNK SM GCJS CF. Performed the experiments: SM JK WW. Analyzed the data: BLG. Contributed reagents/materials/analysis tools: BLG WW. Wrote the paper: BLG SM GCJS WW CF.