Submitted for Publication: September 3, 2013; final revision received November 4, 2013; accepted December 3, 2013.
Published Online: January 30, 2014. doi:10.1001/jamaoto.2013.6533.
Study concept and design: All authors.
Acquisition of data: Ruiz, Jeswani, Andrews.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Ruiz, Branski.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Ruiz, Branski.
Administrative, technical, or material support: Ruiz, Jeswani, Andrews, Rafii, Paul.
Conflict of Interest Disclosures: None reported.