About the Authors

Anita K. Wagner

Anita_Wagner@hms.harvard.edu

Affiliation Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts, United States of America

Amy J. Graves

Affiliation Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts, United States of America

Zhengyu Fan

Affiliation Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts, United States of America

Saul Walker

Affiliation UK Department for International Development, Maputo, Mozambique

Fang Zhang

Affiliation Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts, United States of America

Dennis Ross-Degnan

Affiliation Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Critical review of manuscript: AJG ZF FZ SW DRD. Conceived and designed the experiments: AKW DRD. Analyzed the data: AJG ZF FZ. Wrote the paper: AKW.