About the Authors

David I Shalowitz
Elizabeth Garrett-Mayer
David Wendler

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.