1. Department of Pathology; Institute of Biomedicine; University of Gothenburg; Gothenburg Sweden
2. Myology Institute; Neuromuscular Morphology Unit, Pierre and Marie Curie University; Pitié-Salpêtrière University Hospital Group; Sorbonne Universities; Paris France
3. Neuropathology and Neurology Units; Hospital Universitario 12 de Octubre; Madrid Spain
4. Neuromuscular Explorations and Pathologies Unit; University Hospital Center of Besançon; Besançon France
5. Pathological Anatomy and Cytology Unit; University Hospital Center of Besançon; Besançon France
6. Department of Neurology; Columbia University Medical Center; New York NY
7. Department of Neurology; University Hospital of Bonn; Bonn Germany
8. Neuromuscular Reference Center, Department of Neurology; University Hospitals St-Luc; University of Louvain; Brussels Belgium
9. Department of Neurology; Mayo Clinic College of Medicine; Rochester MN