A Study to Assess the Safety, Tolerability, and Effect on Disease Progression of BIIB105 in Participants With Amyotrophic Lateral Sclerosis (ALS) and Participants With the ALS Ataxin-2 (ATXN2) Genetic Mutation

University of Pennsylvania, Philadelphia

ALS Clinic - Department of Neurology, Neuromuscular Division, Johns Hopkins University, School of Medicine, Baltimore

The Emory Clinic, Atlanta

Mayo Clinic Florida, Jacksonville

Orlando Health, Orlando

Washington University, School of Medicine, St Louis

Houston Methodist Neurological Institute, Houston

University of Colorado Hospital - Neuroscience Center -Anschutz Medical Campus, Aurora

University of Utah, Salt Lake City

Barrow Neurological Institute, Phoenix

University of California San Diego Medical Center, La Jolla

Stanford Neuromuscular Research Center, Palo Alto

Georgetown University, Washington D.C.

Massachusetts General Hospital, Boston

Montreal Neurological Institute-Hospital, Montreal

A.O.U. Città della salute e della scienza di Torino, Torino

UMC Utrecht, Utrecht