A Study to Assess the Efficacy and Safety of Nusinersen (ISIS 396443) in Participants With Later-onset Spinal Muscular Atrophy (SMA)

Columbia University Medical Center, New York

Children's Hospital of Philadelphia - Neurology, Philadelphia

Nemours Children's Hospital, Orlando

Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago

Washington University School of Medicine, St Louis

Children's Medical Center, Dallas

Children's Hospital Colorado, Aurora

UCLA Clinical and Translational Research Center, Los Angeles

Lucile Packard Children's Hospital at Stanford, Palo Alto

Oregon Health & Science University, Portland

Boston Children's Hospital, Boston

Children's Hospital - London Health Sciences Centre, London

McGill University Health Centre-Glen Site-CIM, Montreal

Armand Trousseau Hospital, I-Motion, Clinical Trials Platform, Paris

Universitatsklinikum Essen, Essen

University Hospital Freiberg, Center for Paediatrics and Adolescent Medicine, Department of Neuropaediatrics and Muscular Disease, Freiburg im Breisgau

The University of Hong Kong, Queen Mary Hospital, Department of Paediatrics and Adolescent Medicine, Hong Kong

AOU Policlinico G. Martino Dipartimento di Neuroscienze e Centro Clinico Nemo Sud, Messina

Fondazione Policlinico Universitario Agostino Gemelli-Universita Cattolica de Sacro Cuore-UOC Neuropsichiatre Infantile, Rome

Hyogo College of Medicine, Nishinomya-shi

Tokyo Women's Medical University, Shinjuku-ku

Seoul National University Children's Hospital, Seoul

Hospital Sant Joan de Deu, Barcelona

University of Gothenburg, The Queen Silvia Children's Hospital, Gothenburg