1 Center for Genetic Muscle Disorders, Baltimore, Kennedy Krieger Institute, Departments of Neurology and Neuroscience, Johns Hopkins School of Medicine, Baltimore, MD, USA. Electronic address: wagnerk@kennedykrieger.org.
2 University of Pittsburgh, Pittsburgh, PA, USA.
3 Cumming School of Medicine, University of Calgary, Alberta Children's Hospital, Calgary, AB, Canada.
4 Department of Pediatrics, Clinical Neurological Sciences and Epidemiology, University of Western Ontario, Children's Hospital London Health Sciences Centre, London, ON, Canada.
5 The John Walton Muscular Dystrophy Research Centre, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK.
6 NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Institute of Child Health, University College London, & Great Ormond Street Hospital Trust, London, UK.
7 Hyogo College of Medicine, Nishinomiya, Hyogo, Japan.
8 Lawson Health Research Institute: Children's Hospital, London, ON, Canada.
9 Department of Neurology, Medical University of Warsaw, Warsaw, Poland.
10 University of Minnesota, Minneapolis, MN, USA.
11 University of Utah School of Medicine, Salt Lake City, UT, USA.