Submitted for Publication: May 1, 2014; final revision received June 9, 2014; accepted June 16, 2014.
Published Online: September 11, 2014. doi:10.1001/jamaoto.2014.1944.
Study concept and design: Sand, Nussenbaum.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Sand, Nussenbaum,
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Sand.
Administrative, technical, or material support: Sand, Nussenbaum.
Study supervision: Haughey, Nussenbaum.
Conflict of Interest Disclosures: None reported.
Previous Presentation: This study was presented at the Triological Combined Sections Meeting; January 10-12, 2014; Miami Beach, Florida.