Accepted for Publication: February 10, 2013.
Published Online: August 5, 2013. doi:10.1001/jamapediatrics.2013.465.
Study concept and design: Momper, Mulugeta, Karesh, Burckart.
Acquisition of data: Momper, Mulugeta, Green.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Momper, Karesh, Burckart.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Momper.
Administrative, technical, and material support: Karesh, Sachs, Burckart.
Study supervision: Mulugeta, Sachs, Yao, Burckart.
Conflict of Interest Disclosures: None reported.
Disclaimer: The opinions expressed in this article are those of the authors and should not be interpreted to be the position of the US Food and Drug Administration.