The aim of this study is to create a repository of both cross-sectional and longitudinal data, including cognitive, linguistic, imaging and biofluid biological specimens, for neurodegenerative disease research and treatment.
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Status of progression - changes in neuropsychological tests.
Timeframe: This is a natural history study-participants are followed from date of enrollment until death, withdraw, or funding is no longer available, or until 600 months have passed.