1. Inflammatory Neuropathy Clinic University Hospitals Birmingham Birmingham United Kingdom
2. Aston Medical School Aston University Birmingham United Kingdom
3. Brain Center Rudolf Magnus, Department of Neurology and Neurosurgery University Medical Center Utrecht Heidelberglaan 100, 3584 CX, Utrecht The Netherlands
4. Reference Centre for Neuromuscular Diseases and ALS Centre Hospitalier Universitaire La Timone 264 rue Saint‐Pierre, 13385, Marseille France
5. Aix‐Marseille University Inserm, GMGF, Marseille France
6. Department of Neurology, Medical Faculty and Center of Neurology and Neuropsychiatry LVR Klinikum, Heinrich‐Heine University Düsseldorf Germany