Accepted for Publication: May 8, 2013.
Published Online: August 12, 2013. doi:10.1001/jamapediatrics.2013.2904.
Study concept and design: Gregory, Grotegut, Miranda.
Acquisition of data: Osgood, Miranda.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: All authors.
Critical revision of the manuscript for important intellectual content: Anthopolos, Grotegut, Miranda.
Statistical analysis: Anthopolos, Osgood, Miranda.
Obtained funding: Miranda.
Administrative, technical, and material support: Gregory, Osgood, Miranda.
Conflict of Interest Disclosures: None reported.
Funding/Support: Support for this research was provided by funding from the United States Environmental Protection Agency (RD-83329301) (Mss Anthopolos and Osgood and Dr Miranda).
Additional Contributions: We thank the participants of this study and Angeline Luong, BS, for assistance with summarizing previous epidemiological data.