{"nct_id":"NCT04488133","title":"A Study to Learn About the Effect of Nusinersen (BIIB058) Given as Injections to Children With Spinal Muscular Atrophy (SMA) Who Were Previously Treated With Onasemnogene Abeparvovec (RESPOND)","status":"ACTIVE_NOT_RECRUITING","status_verified_date":"2025-02","start_date":"2021-01-04","start_date_type":"ACTUAL","primary_completion_date":"2025-10-07","primary_completion_date_type":"ESTIMATED","completion_date":"2025-10-07","completion_date_type":"ESTIMATED","phases":["PHASE4"],"tickers":["BIIB"]}