About the Authors

Johanna Useem

Affiliation Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts, United States of America

Alana Brennan

Affiliations Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts, United States of America, Center for Global Health & Development, Boston University School of Public Health, Boston, Massachusetts, United States of America, Health Economics and Epidemiology Research Office, Department of Internal Medicine, School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa

Michael LaValley

Affiliation Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, United States of America

Michelle Vickery

Affiliation Department of Global Health, Boston University School of Public Health, Boston, Massachusetts, United States of America

Omid Ameli

Affiliation Department of Global Health, Boston University School of Public Health, Boston, Massachusetts, United States of America

Nichole Reinen

Affiliation Department of Global Health, Boston University School of Public Health, Boston, Massachusetts, United States of America

Christopher J. Gill

cgill@bu.edu

Affiliations Center for Global Health & Development, Boston University School of Public Health, Boston, Massachusetts, United States of America, Department of Global Health, Boston University School of Public Health, Boston, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AB MV OA NR CJG. Performed the experiments: JU MV OA NR CJG. Analyzed the data: JU AB OA NR CJG. Wrote the paper: JU AB MLV MV OA NR CJG.