Accepted for Publication: March 5, 2012.
Published Online: September 17, 2012. doi:10.1001/archneurol.2012.574
Author Contributions:Study concept and design: Tadic, Brüggemann, and Klein. Acquisition of data: Tadic, Brüggemann, Stiller, Hagenah, and Klein. Analysis and interpretation of data: Tadic, Kasten, Brüggemann, and Klein. Drafting of the manuscript: Tadic and Kasten. Critical revision of the manuscript for important intellectual content: Tadic, Kasten, Brüggemann, Stiller, Hagenah, and Klein. Statistical analysis: Tadic and Kasten. Obtained funding: Klein. Administrative, technical, and material support: Brüggemann, Stiller, and Klein. Study supervision: Hagenah and Klein.
Financial Disclosure: Drs Kasten and Brüggemann both receive funding from the German Research Foundation. Dr Hagenah receives funding from the Bachmann-Strauss Dystonia & Parkinson Foundation and speaking honoraria from GlaxoSmithKline. Dr Klein's work is supported by grants from the Hermann and Lilly Schilling Foundation, grant 01GI0201 from the Federal Ministry of Education and Research (BMBF), and funding from the Bachmann-Strauss Dystonia & Parkinson Foundation. She has also received consulting fees from Centogene and speaking honoraria from Shire and Merz Pharma.
Role of the Sponsor: The funders had no role in the design and conduct of the study; in the collection, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.
Additional Contributions: We thank the patients for their time and effort.