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)

Ospedale Pediatrico Bambino Gesù, Rome

Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Roma

Semmelweis Egyetem, Budapest

UZ Leuven, Leuven

Hospital Sant Joan de Deu, Esplugues de Llobregat

UZ Gent, Ghent

Columbia University, New York

Ospedale S G Battista Molinette, Torino

Charité - Campus Virchow-Klinikum, Berlin

University of Pennsylvania, Philadelphia

Georgetown University, Washington D.C.

Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan

Fondazione Serena Onlus - Centro Clinico Nemo, Milan

Children's Hospital of The King's Daughters, Norfolk

Wake Forest University - School of Medicine - Central, Winston-Salem

Rare Disease Research, LLC, Atlanta

Universitaetsklinikum Giessen und Marburg GmbH, Giessen

The Ohio State, Columbus

Universitaetsklinikum Essen, Essen

Universitaetsklinikum Essen, Essen

Hospital Universitari i Politecnic La Fe, Valencia

Memorial Healthcare, Owosso

University of Iowa Stead Family Children's Hospital, Iowa City

University of Wisconsin, Madison

Universitaetsklinikum Heidelberg, Heidelberg

Arkansas Children's Hospital, Little Rock

Neurology Rare Disease Center, Denton

The University of Texas Health Science Center at Houston, Houston

Klinikum rechts der Isar der TU Muenchen, Munich

Barrow Neurological Institute, Phoenix

Universitaetsklinikum Ulm, Ulm

Loma Linda University Children's Hospital, Loma Linda

Stanford Neuroscience Health Center, Palo Alto

University of Washington Medical Center, Seattle

Hospital das Clinicas - FMUSP, São Paulo

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

Boston Children's Hospital, Boston

Hospital de Clínicas de Porto Alegre, Porto Alegre

Yokohama City University Hospital, Yokohama

NHO Osaka Toneyama Medical Center, Toyonaka-shi

Szpital Specjalistyczny im. L.Rydygiera w Krakowie, Krakow

Instytut Centrum Zdrowia Matki Polki, Lodz

Samodzielny Publiczny Centralny Szpital Kliniczny, Warsaw

Uniwersytecki Szpital Kliniczny im. Jana Mikulicza Radeckiego we Wroclawiu, Wroclaw