About the Authors

Alison C. Roxby

aroxby@u.washington.edu

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

Alison L. Drake

Affiliation Department of Global Health, University of Washington, Seattle, Washington, United States of America

Grace John-Stewart

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

Elizabeth R. Brown

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

Daniel Matemo

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

Phelgona A. Otieno

Affiliation Centre for Clinical Research, Kenya Medical Research Institute, Nairobi, Kenya

Carey Farquhar

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, Department of Epidemiology, 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: ACR GJ-S CF. Analyzed the data: ACR ALD ERB GJ-S CF. Wrote the paper: ACR CF. Acquisition of data: ACR ALD PAO DNM GJ-S CF. Critical revision of the manuscript for important intellectual content: ACR ALD ERB GJ-S DNM PAO CF.