About the Authors
- David I Shalowitz
- Elizabeth Garrett-Mayer
- David Wendler
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*To whom correspondence should be addressed. E-mail: dwendler@nih.gov
Competing Interests
The authors declare that no competing interests exist with respect to this paper. The opinions expressed are the authors' own. They do not represent any position or policy of the United States National Institutes of Health, Public Health Service, or Department of Health and Human Services.