{"nct_id":"NCT04729907","title":"A Study to Learn About the Long-Term Safety of Higher Doses of Nusinersen (BIIB058) Given as Injections to Participants With Spinal Muscular Atrophy (SMA) Who Took Part in an Earlier Nusinersen Trial (ONWARD)","status":"ACTIVE_NOT_RECRUITING","status_verified_date":"2025-01","start_date":"2021-04-19","start_date_type":"ACTUAL","primary_completion_date":"2026-07-31","primary_completion_date_type":"ESTIMATED","completion_date":"2026-07-31","completion_date_type":"ESTIMATED","phases":["PHASE3"],"tickers":["BIIB"]}