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Cora Peterson, PhD, National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, 1600 Clifton Rd NE, MS E-86, Atlanta, GA 30333. cora.peterson@cdc.hhs.gov
Dr Peterson led the study design, data analysis, and interpretation of findings; and drafted the initial manuscript. Dr Grosse assisted with the study design, data analysis, and interpretation of findings; and edited the manuscript. Drs Oster and Olney provided clinical oversight, assisted with the interpretation of findings, and edited the manuscript. Dr Cassell assisted with the study design and interpretation of findings, and edited the manuscript. All authors approved the final manuscript as submitted.
The authors have no financial relationships relevant to this article to disclose.
No external funding.
© 2013 by the American Academy of Pediatrics.