Accepted for Publication: February 28, 2013.
Published Online: May 13, 2013. doi:10.1001/jamainternmed.2013.6154.
Acquisition of data: Jacobson.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Jacobson and Havas.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: McCarter.
Obtained funding: Jacobson.
Administrative, technical, and material support: Havas.
Study supervision: Jacobson and Havas.
Conflict of Interest Disclosures: None reported.
Additional Contributions: Julie Greenstein, MHS, Sharon Connistra, BA, Alison Brown, MS, Cassie Boles, BS, and Janna dePorter, BS, collected data and performed fact checking.
Correction: This article was corrected online May 30, 2013, for a word change in the second sentence of the introduction.