About the Authors
- Christa L. Fischer Walker
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* E-mail: cfischer@jhsph.edu
Affiliation Johns Hopkins Bloomberg School of Public Health, Department of International Health, Baltimore, Maryland, United States of America
- Olivier Fontaine
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Affiliation World Health Organization, Geneva, Switzerland (Retired)
- Robert E. Black
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Affiliation Johns Hopkins Bloomberg School of Public Health, Department of International Health, Baltimore, Maryland, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Wrote the first draft of the manuscript: CLFW. Contributed to the writing of the manuscript: REB OF. ICMJE criteria for authorship read and met: CLFW REB OF. Agree with manuscript results and conclusions: CLFW REB OF.