1. Department of Neuromuscular Diseases UCL Queen Square Institute of Neurology London UK
2. Department of Neurology University of Rochester Rochester NY
3. Unit of Rare Neurodegenerative and Neurometabolic Diseases, Department of Clinical Neurosciences Fondazione IRRCCS Istituto Neurologico Carlo Besta Milan Italy
4. Department of Neurology The Perelman School of Medicine at the University of Pennsylvania Philadelphia PA
5. Center for Experimental Neurotherapeutics St. Jude Children's Research Hospital Memphis TN
6. Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute for Human Genomics University of Miami Miller School of Medicine Miami FL
7. Sydney School of Health Sciences University of Sydney Sydney Australia
8. Department of Neurology Carver College of Medicine, University of Iowa Iowa IA