1. Department of Neurology University of Colorado Denver Aurora CO USA
2. Department of Child Neurology Scientific Institute for Research and Health Care Foundation Carlo Besta Neurological Institute Milan Italy
3. Department of Clinical Neurosciences Scientific Institute for Research and Health Care Foundation Carlo Besta Neurological Institute Milan Italy
4. Maugeri Scientific Clinical Institutes Neurorehabilitation Unit, Scientific Institute of Telese Terme Telese Terme Italy
5. Centre for Neuromuscular Diseases University College London Queen Square Institute of Neurology London UK
6. Dubowitz Neuromuscular Centre University College London Institute of Child Health and Great Ormond Street Hospital London UK
7. Department of Neurology University of Iowa Hospitals and Clinics Iowa City IA USA
8. Department of Neurology Wayne State University Detroit MI USA
9. Department of Neurology University of Rochester Rochester NY USA
10. Department of Neurology Vanderbilt University Nashville TN USA
11. Department of Neurology University of Michigan Ann Arbor MI USA
12. PRA Health Sciences Raleigh NC USA
13. Departments of Neurology and Neuroscience John Hopkins University School of Medicine Baltimore MD USA
14. Department of Neurology Stanford University Stanford CA USA
15. Department of Neurology Perelman School of Medicine, University of Pennsylvania Philadelphia PA USA
16. Department of Neurology Children's Hospital of Philadelphia Philadelphia PA USA
17. Department of Neurology Massachusetts General Hospital Boston MA USA
18. Department of Neurology Nemours Children's Hospital Orlando FL USA