Published Online: July 15, 2013. doi:10.1001/jamapediatrics.2013.108.
Study concept and design: Movsas, Paneth, Gewolb.
Acquisition of data: Rumbeiha, Zyskowski, Gewolb.
Analysis and interpretation of data: Movsas, Paneth, Gewolb.
Drafting of the manuscript: Movsas, Paneth, Zyskowski.
Critical revision of the manuscript for important intellectual content: Movsas, Paneth, Rumbeiha, Gewolb.
Statistical analysis: Movsas, Paneth, Gewolb.
Administrative, technical, and material support: Movsas, Paneth, Zyskowski, Gewolb.
Study supervision: Movsas, Paneth, Gewolb.
Conflict of Interest Disclosures: None reported.
Funding/Support: This project was undertaken by Dr Movsas while she was a postdoctoral fellow in the National Institutes of Health T32 Training Program in Perinatal Epidemiology at Michigan State University, grant 2T32HD046377.