Accepted for Publication: May 14, 2013.
Published Online: September 23, 2013. doi:10.1001/jamaneurol.2013.3521.
Study concept and design: Milone, Wong.
Acquisition of data: Milone, Klassen, Haas, Wong.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Milone.
Critical revision of the manuscript for important intellectual content: All authors.
Obtained funding: Milone.
Administrative, technical, and material support: Milone, Klassen.
Study supervision: Milone.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by the Mayo Clinic Center for Translational Science Activities through grant UL1 RR024150 from the National Institutes of Health National Center for Research Resources (Dr Milone).
Role of the Sponsor: The funders had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Previous Presentation: This paper was presented in poster format at the American Academy of Neurology meeting; March 21, 2013; San Diego, California.