About the Authors

E. Ray Dorsey

ray.dorsey@jhmi.edu

Affiliation Department of Neurology, Johns Hopkins Medicine, Baltimore, Maryland, United States of America

the Huntington Study Group COHORT Investigators

For a full list of the Huntington Study Group COHORT Investigators please see the Acknowledgments section.

Competing Interests

J. Giuliano, D. van Kammen, and J. Warner are employed by CHDI Foundation Inc, the sponsor of this study. No other authors have financial disclosures related to this manuscript. This does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: RD TF JGG IS. Performed the experiments: JA PA CB EC AC RC AC JC JD LD MD RD CD HD RD KD KE SF MF TF SF SF SF MG JG JG TG JG JGG MH SH DH VH JJ JJ DJ RJ UK MLK SK RK BL ML PL CL MM KM WM KM FM AM EM JEM JM CM MN FN DO CO AP MP JP GP SP JP KQ MQ LR FR SR BR DR CR MS JS BS KS IS CS OS GS ST KT TT CT DV LV FW JW PW WW VW OY. Analyzed the data: CB DO. Wrote the paper: LD RD.