About the Authors
- Helen W. Sullivan
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* E-mail: Helen.Sullivan@fda.hhs.gov
Affiliation U.S. Food and Drug Administration, Silver Spring, Maryland, United States of America
- Kathryn J. Aikin
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Affiliation U.S. Food and Drug Administration, Silver Spring, Maryland, United States of America
- Eunice Chung-Davies
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Affiliation U.S. Food and Drug Administration, Silver Spring, Maryland, United States of America
- Michael Wade
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Affiliation U.S. Food and Drug Administration, Silver Spring, Maryland, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: HWS KJA. Analyzed the data: HWS EC MW. Wrote the paper: HWS KJA EC MW.