{"nct_id":"NCT05067790","title":"A Study to Learn About the Effect of Higher Doses of Nusinersen (BIIB058) Given as Injections to Participants With Spinal Muscular Atrophy (SMA) Who Were Previously Treated With Risdiplam (ASCEND)","status":"ACTIVE_NOT_RECRUITING","status_verified_date":"2025-05","start_date":"2022-01-21","start_date_type":"ACTUAL","primary_completion_date":"2027-06-14","primary_completion_date_type":"ESTIMATED","completion_date":"2027-06-14","completion_date_type":"ESTIMATED","phases":["PHASE3"],"tickers":["BIIB"]}