About the Authors

Krisda H. Chaiyachati

Krisda.Chaiyachati@yale.edu

Affiliations Yale University School of Medicine, New Haven, Connecticut, United States of America, Tugela Ferry Care and Research Collaboration (TF CARES), Tugela Ferry, South Africa

Marian Loveday

Affiliations Health Systems Research Unit, Medical Research Council, Cape Town, South Africa, Discipline of Public Health Medicine, University of KwaZulu-Natal, Durban, South Africa

Stephen Lorenz

Affiliation Laboratory of Computer Science, Massachusetts General Hospital, Boston, Massachusetts, United States of America

Neal Lesh

Affiliation Dimagi, Inc., Charlestown, Massachusetts, United States of America

Lee-Megan Larkan

Affiliation KwaZulu-Natal Department of Health, Greytown, South Africa

Sandro Cinti

Affiliation University of Michigan Medical School & Veterans Affairs Ann Arbor Health System, Ann Arbor, Michigan, United States of America

Gerald H. Friedland

Affiliations Yale University School of Medicine, New Haven, Connecticut, United States of America, Tugela Ferry Care and Research Collaboration (TF CARES), Tugela Ferry, South Africa

Jessica E. Haberer

Affiliation Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America

Competing Interests

The authors have the following interests. Dimagi, Inc. employs Neal Lesh. Dimagi developed the mobile phone application, CommCare, which was used in this study for free. There are no further patents, products in development or marketed products to declare. 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: KHC ML SL NL JH. Performed the experiments: KHC ML LML. Analyzed the data: KHC ML JH. Wrote the paper: KHC ML SL NL LML SC GF JH. Design and creation of the mobile phone application, Mobilize: KHC SL NL.