1. Department of Neurology, Center for Lysosomal and Metabolic Diseases, Erasmus Medical Center University Medical Center Rotterdam Rotterdam the Netherlands
2. Psychometric Laboratory for Health Sciences University of Leeds Leeds UK
3. Department of Neurology Friedrich Baur Institute, Ludwig Maximilian University Munich Germany
4. Department of Oncology‐Pathology Karolinska Institute Stockholm Sweden
5. Département de Neurologie Hôpital Raymond Poincaré Paris France
6. John Walton Muscular Dystrophy Research Centre Newcastle University Newcastle UK
7. Department of Neurology University Hospitals Leuven Leuven Belgium
8. Laboratory for Muscle Diseases and Neuropathies, Department of Neurosciences Katholieke Universiteit Leuven Leuven Belgium
9. Department of Neurosciences Rita Levi Montalcini Università degli Studi di Torino Turin Italy
10. Unit of Neurology and Neuromuscular Diseases, Department of Clinical and Experimental Medicine University of Messina Messina Italy
11. Department of Neurology Kantonsspital St. Gallen St. Gallen Switzerland
12. Department of Pediatrics, Center for Lysosomal and Metabolic Diseases, Erasmus Medical Center University Medical Center Rotterdam Rotterdam the Netherlands