Accepted for Publication: August 6, 2013.
Published Online: February 10, 2014. doi:10.1001/jamaneurol.2013.4668.
Study concept and design: All authors.
Analysis and interpretation of data: X. Dang, Koralnik, Todd.
Drafting of the manuscript: L. Dang, Todd.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: X. Dang, Koralnik.
Obtained funding: X. Dang, Koralnik, Todd.
Study supervision: Todd.
Conflict of Interest Disclosures: Dr Todd has received grants from the National Institutes of Health (AG013283), the Veterans Administration (VAMC/BLRD 1I01BX001689), the American Academy of Neurology Foundation, and the National Ataxia Foundation for work unrelated to this project. No other disclosures were reported.
Funding/Support: This study was supported by grants R01 NS 074995, R01 NS 047029, and K24 060950 (Dr Koralnik) and grant K08NS069809 (Dr Todd) from the National Institutes of Health.
Role of the Sponsor: The funding source had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Contributions: We thank the patient and his family for their participation and consent to research related to this case. Amy Krans, MSc, contributed technical expertise to this project.
Correction: This article was corrected on February 12, 2014, to fix the Author Contributions section.