Content Validity of the Friedreich Ataxia Rating Scale in Patients with Spinocerebellar Ataxia by Michele Potashman, Katja Rudell, Naomi Suminski, Rinchen Doma, Maggie Heinrich, Linda Abetz-Webb, Melissa Wolfe Beiner, Vlad Coric, Liana S. Rosenthal, Sheng-Han Kuo, Theresa Zesiewicz, Terry D. Fife, Bart van de Warrenburg, Giovanni Ristori, Matthis Synofzik, Sub Subramony, Susan Perlman, Jeremy D. Schmahmann, Gil L’Italien

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