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Correspondence: Dr. Sheng-Han Kuo, 650 West 168th Street, Room 305, New York, NY 10032, USA. Tel: (212) 342-3753, Fax: (212) 305-1304, sk3295@columbia.edu
Author Contributions:Ms. Lai: study concept and design, statistical analysis and interpretation, writing the manuscript, critical revision of the manuscript for important intellectual content. Mrs. Tomishon: statistical analysis and interpretation, critical revision of the manuscript for important intellectual content.
Ms. Figueroa: acquisition of data, critical revision of the manuscript for important intellectual content, study supervision. Dr. Pulst: acquisition of data, critical revision of the manuscript for important intellectual content, study supervision.
Dr. Perlman: acquisition of data. Dr. Wilmot: acquisition of data. Dr. Gomez: acquisition of data. Dr. Schmahmann: acquisition of data. Dr. Paulson: acquisition of data. Dr. Shakkottai: acquisition of data. Dr. Ying: acquisition of data. Dr. Zesiewicz: acquisition of data. Dr. Bushara: acquisition of data.
Dr. Geschwind: acquisition of data. Dr. Xia: acquisition of data. Dr. Subramony: acquisition of data. Dr. Ashizawa: acquisition of data. Dr. Kuo: study concept and design, acquisition of data, analysis and interpretation, critical revision of the manuscript for important intellectual content.
Disclosure: Authors reported no conflict of interests.
The CRC-SCA natural history study is supported by the Rare Disease Clinical Research Network (RDCRN) (RC1NS068897), and the National Ataxia Foundation.
Dr. Kuo is supported by the NINDS K08 NS083738, Louis V. Gerstner Jr. Scholarship, American Brain Research Training Fellowship, Parkinson’s Disease Foundation, American Parkinson’s Disease Association, Rare Disease Clinical Research Network (RDCRN) (RC1NS068897), International Essential Tremor Foundation, and NIEHS pilot grant ES009089, the Smart Foundation.
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