Submitted for Publication: December 13, 2014; final revision received December 22, 2014; accepted December 28, 2014.
Published Online: March 12, 2015. doi:10.1001/jamaoto.2015.0219.
Study concept and design: Johnson, Svider, Folbe, Shkoukani, Eloy, Zuliani.
Acquisition, analysis, or interpretation of data: Johnson, Svider, Raza.
Drafting of the manuscript: Johnson, Svider.
Critical revision of the manuscript for important intellectual content: Johnson, Svider, Folbe, Raza, Shkoukani, Eloy, Zuliani.
Statistical analysis: Johnson, Svider.
Obtained funding: Svider.
Administrative, technical, or material support: Svider, Eloy.
Study supervision: Svider, Folbe, Raza, Shkoukani, Eloy, Zuliani.
Conflict of Interest Disclosures: None reported.