About the Authors
- Ann Levin
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Affiliation Independent consultant to WHO, Washington D.C., United States of America
- Susan A. Wang
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Affiliation Department of Immunization, Vaccines and Biologicals, World Health Organization, Geneva, Switzerland
- Carol Levin
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Affiliation University of Washington, Seattle, Washington, United States of America
- Vivien Tsu
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Affiliation PATH, Seattle, Washington, United States of America
- Raymond Hutubessy
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* E-mail: hutubessyr@who.int
Affiliation Department of Immunization, Vaccines and Biologicals, World Health Organization, Geneva, Switzerland
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: AL SAW CL. Analyzed the data: AL CL. Contributed reagents/materials/analysis tools: SAW VT RH. Wrote the paper: AL.