1. Department of PathologyInstitute of Biomedicine, University of GothenburgGothenburg Sweden
2. Department of NeurologyFriedrich‐Baur‐Institute, Ludwig‐Maximilians‐UniversityMunich Germany
3. Paris‐Est Neuromuscular Reference CenterPitié‐Salpêtrière HospitalAP‐HPParis France
4. Department of Pathology and NeuropathologyState Neuropsychiatric Hospital Wagner‐JaureggLinz Austria
5. Department of NeurologyUniversity of Gothenburg, Sahlgrenska University HospitalGothenburg Sweden
6. Institute of Myology, National Institute of Health and Medical Research, Mixed Unit of Research 974, National Center for Scientific Research, Mixed Unit of Research 7215, Pierre and Marie Curie University, Pitié‐Salpêtrière Hospital Group, Public Assistance Hospitals of ParisParis France
7. Department of Medical Biochemistry and Cell BiologyInstitute of Biomedicine, University of GothenburgGothenburg Sweden
8. Department of NeurologyColumbia University Medical CenterNew York NY
9. APHP, Cochin Hospital, Cardiology Department, Paris, France and Paris‐DescartesSorbonne Paris Cité University75006Paris France
10. Department of NeurologyHospital of the Barmherzige BrüderLinz Austria
11. Department of NeurologyMayo Clinic College of MedicineRochester MN