Accepted for Publication: April 15, 2014.
Published Online: August 25, 2014. doi:10.1001/jamaneurol.2014.1205.
Study concept and design: All authors.
Acquisition, analysis, or interpretation of data: Turkalp, Das.
Drafting of the manuscript: All authors.
Critical revision of the manuscript for important intellectual content: Karamchandani, Das.
Study supervision: Das
Conflict of Interest Disclosures: None reported.
Funding/Support: Dr Das is supported by awards from the Toronto-based philanthropic organization b.r.a.i.n.child and the Canadian Cancer Society Research Institute.
Role of the Sponsor: The funding agencies had no role in the design and conduct of the study; collection, management, analysis, or interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.