Accepted for Publication: April 16, 2013.
Published Online: November 14, 2013. doi:10.1001/jamafacial.2013.1431.
Study concept and design: Hohman, Kleiss, Knox, Weinberg, Hadlock.
Acquisition of data: Hohman, Kleiss, Knox, Weinberg, Hadlock.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Hohman, Weinberg, Hadlock.
Critical revision of the manuscript for important intellectual content: Kleiss, Knox, Heaton, Hadlock.
Statistical analysis: Kleiss, Knox, Weinberg, Hadlock.
Obtained funding: Heaton, Hadlock.
Administrative, technical, or material support: Knox, Hadlock.
Study supervision: Hohman, Heaton, Hadlock.
Conflict of Interest Disclosures: None reported.
Funding/Support: The work of Drs Heaton and Hadlock was facilitated by a grant from the National Institutes of Health, which provided funding for the use of laboratory and animal care facilities.
Role of the Sponsor: The National Institutes of Health had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.