The Pre-symptomatic Familial Amyotrophic Lateral Sclerosis (Pre-fALS) Study (Pre-fALS)  

Pre-fALS is a prospective natural history and biomarker study of people not yet affected with ALS, but who are at genetic risk for developing ALS. The investigators aim to recruit unaffected (healthy) people from familial ALS (fALS) pedigrees in which a known genetic mutation associated with ALS has been identified; …