About the Authors

Justin Shenje

Contributed equally to this work with: Justin Shenje, Peter S. Millard

Affiliation Department of Epidemiology, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa

Peter S. Millard

Contributed equally to this work with: Justin Shenje, Peter S. Millard

pmillard@me.com

Affiliation Department of Epidemiology, Graduate Program in Public Health, University of New England, Portland, Maine, United States of America

Competing Interests

The authors received no specific funding for this work, did not/do not serve as employees or consultants, and have no financial interest in this product or any marketed products or products in development. The authors have no competing interests, defined as anything that interferes with, or could reasonably be perceived as interfering with, the full and objective presentation, peer review, editorial decision-making, or publication of research or non-research articles. No competing interests, financial or non-financial, professional, or personal, exist. No competing interests exist in relationship to an organization or another person. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: JS PM. Performed the experiments: JS. Analyzed the data: JS PM. Contributed reagents/materials/analysis tools: JS PM. Wrote the paper: JS PM.