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History
- Accepted September 20, 2006
- Published online June 22, 2007.
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- previous version (February 12, 2007 - 10:00).
- You are viewing the most recent version of this article.
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Copyright © 2007 by the American Academy of Pediatrics
Author Information
- aDepartment of Pediatrics, Brown Medical School, Brown University, Providence, Rhode Island
- bDepartment of Pediatrics, Women and Infants Hospital of Rhode Island, Providence, Rhode Island
- cDepartment of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas
- dStatistics and Epidemiology Unit, Research Triangle Institute, Research Triangle Park, North Carolina