Accepted for Publication: July 22, 2013.
Published Online: October 21, 2013. doi:10.1001/jamaneurol.2013.4437.
Study concept and design: All authors.
Acquisition of data: de Carvalho.
Analysis and interpretation of data: All authors
Drafting of the manuscript: All authors.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: All authors.
Obtained funding: de Carvalho.
Administrative, technical, or material support: All authors.
Study supervision: Swash.
Conflict of Interest Disclosures: None reported.
Funding/Support: This project was partially supported by the EU Joint Programme–Neurodegenerative Disease Research (JPND) project. The project is supported through the “Fundação para a Ciência e a Tecnologia” in Portugal. The grant was applied for study management.
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.