About the Authors

Thomas A. Odeny

Affiliations Department of Epidemiology, University of Washington, Seattle, Washington, United States of America, Center for Microbiology Research, Kenya Medical Research Institute, Nairobi, Kenya

Robert C. Bailey

Affiliation Chicago Developmental Center for AIDS Research, University of Illinois at Chicago, Chicago, Illinois, United States of America

Elizabeth A. Bukusi

Affiliations Center for Microbiology Research, Kenya Medical Research Institute, Nairobi, Kenya, Department of Global Health, University of Washington, Seattle, Washington, United States of America, Department of Obstetrics and Gynecology, University of Washington, Seattle, Washington, United States of America

Jane M. Simoni

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

Kenneth A. Tapia

Affiliations Department of Global Health, University of Washington, Seattle, Washington, United States of America, Center for AIDS and STD, University of Washington, Seattle, Washington, United States of America

Krista Yuhas

Affiliations Department of Global Health, University of Washington, Seattle, Washington, United States of America, Center for AIDS and STD, University of Washington, Seattle, Washington, United States of America

King K. Holmes

Affiliations Department of Global Health, University of Washington, Seattle, Washington, United States of America, Department of Medicine, University of Washington, Seattle, Washington, United States of America, Center for AIDS and STD, University of Washington, Seattle, Washington, United States of America

R. Scott McClelland

mcclell@u.washington.edu

Affiliations Department of Epidemiology, University of Washington, Seattle, Washington, United States of America, Department of Global Health, University of Washington, Seattle, Washington, United States of America, Department of Medicine, University of Washington, Seattle, Washington, United States of America, Center for AIDS and STD, University of Washington, Seattle, Washington, United States of America

Competing Interests

The authors have the following interest: Dimagi, Inc. provided the software set-up and technical support. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials, as detailed online in the guide for authors.

Author Contributions

Conceived and designed the experiments: TAO RCB EB JS KT KY KKH RSM. Performed the experiments: TAO RCB EB KKH RSM. Analyzed the data: TAO RCB JS KT KY KKH RSM. Wrote the paper: TAO RCB EB JS KT KY KKH RSM. Approved the final manuscript: TAO RCB EB JS KT KY KKH RSM.