Accepted for Publication: February 19, 2013.
Published Online: July 15, 2013. doi:10.1001/jamapediatrics.2013.2241.
Acquisition of data: Hyun, Hersh, Maples.
Analysis and interpretation of data: Hyun, Palazzi.
Drafting of the manuscript: Hyun, Hersh, Palazzi, Maples, Newland, Saiman.
Critical revision of the manuscript for important intellectual content: Hyun, Hersh, Namtu, Palazzi, Newland, Saiman.
Administrative, technical, and material support: Hyun, Namtu, Newland.
Study supervision: Hyun, Saiman.
Conflict of Interest Disclosures: None reported.