Accepted for Publication: July 15, 2011.
Published Online: October 10, 2011. doi:10.1001/archneurol.2011.1181
Author Contributions:Study concept and design: Messing and Brenner. Acquisition of data: Messing, Li, Naidu, Silverman, Flint, van der Knaap, and Brenner. Analysis and interpretation of data: Messing, Li, Naidu, Taylor, Silverman, van der Knaap, and Brenner. Drafting of the manuscript: Messing, Silverman, Flint, and Brenner. Critical revision of the manuscript for important intellectual content: Messing, Li, Naidu, Taylor, van der Knaap, and Brenner. Obtained funding: Messing and Brenner. Administrative, technical, and material support: Messing, Naidu, Flint, and Brenner. Study supervision: Messing and Brenner.
Financial Disclosure: None reported.
This article was corrected for errors on March 28, 2012.