Accepted for Publication: March 21, 2014.
Published Online: September 29, 2014. doi:10.1001/jamaneurol.2014.836.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Cachia, Smith, Pomorska.
Critical revision of the manuscript for important intellectual content: Smith, Paydarfar, Pomorska.
Administrative, technical, or material support: Cachia.
Study supervision: Smith, Paydarfar, Pomorska.
Conflict of Interest Disclosures: None reported.