P652: High-yield diagnostic testing of FGF14 repeat expansion in cerebellar ataxia across the North American population oleh Megan Forrest, Megan Delfeld, Alexander Gary, April Franco, Sanjukta Tawde, Malia Triebold, Widad Abou-Chaar, Vikram Shakkottai, Sharan Srinivasan, Khalaf Bushara, Bernard Brais, David Pellerin, Christopher Gomez, Soma Das