Clinical Trial Information Request for Protocol 2022P000831 Title Phase 2b, Multicenter, Randomized, Double-Blind, Placebo-Controlled Study to Determine the Efficacy and Safety of BIIB122 in Participants with Parkinson’s Disease PI Site Directions: Type your name, contact email and phone number (optional) into the boxes below then click Save to Submit your request for information about this study. Name Email Phone