1. Department of Pathology University Hospital of Limoges Limoges France
2. Laboratory of Neurology University Hospital of Limoges Limoges France
3. EA6309 University of Medicine and Pharmacology of Limoges Limoges France
4. Department of Neuropathology APHP Pitié‐Salpêtrière University Hospital Sorbonne University University Pierre et Marie Curie Paris France
5. Department of Neuromyology National Reference Center of Neuromuscular Disorders APHP Pitié‐Salpêtrière University Hospital Sorbonne University University Pierre et Marie Curie Paris France
6. Division of Rheumatology and Research Center Centre Hospitalier de l'Université de Montréal Montreal Quebec Canada
7. Department of Internal Medicine and Clinical Immunology National Reference Center of Neuromuscular disorders APHP Pitié‐Salpêtrière University Hospital Sorbonne University University Pierre et Marie Curie Paris France
8. Department of Radiology APHP Pitié‐Salpêtrière University Hospital Sorbonne University University Pierre et Marie Curie Paris France
9. INSERM UMR974 Sorbonne University University Pierre et Marie Curie Paris France