Accepted for Publication: July 31, 2015.
Published Online: September 26, 2015. doi:10.1001/jamaneurol.2015.2561.
Study concept and design: Miocinovic, de Hemptinne, Starr.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Miocinovic.
Critical revision of the manuscript for important intellectual content: de Hemptinne, Qasim, Ostrem, Starr.
Statistical analysis: Miocinovic, de Hemptinne.
Obtained funding: de Hemptinne, Starr.
Administrative, technical, or material support: de Hemptinne, Qasim, Ostrem.
Study supervision: Ostrem, Starr.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by a research training fellowship from the American Brain Foundation, a clinical fellowship from the Dystonia Medical Research Foundation, a grant from the Bachmann-Strauss Dystonia & Parkinson Foundation, and grant R01-NS069779 from the National Institutes of Health.
Role of the Funder/Sponsor: The funding sources 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.
Additional Contributions: Nicole Swann, PhD, Department of Neurosurgery, University of California, San Francisco (UCSF) provided discussion and critical review of the manuscript. Nathan Ziman, BS, Department of Neurology, UCSF, helped with clinical data retrieval. Neither contributor received any compensation for their contributions.