Accepted for Publication: September 6, 2013.
Published Online: April 21, 2014. doi:10.1001/jamaneurol.2013.5083.
Study concept and design: Holder, Agadi.
Acquisition, analysis, or interpretation of data: Holder, Reese, Rehder, Quach.
Drafting of the manuscript: Holder, Agadi.
Critical revision of the manuscript for important intellectual content: Holder, Reese, Rehder, Quach.
Administrative, technical, or material support: Holder, Reese, Rehder, Quach.
Study supervision: Agadi.
Conflict of Interest Disclosures: None reported.