1. Department of Laboratory Medicine University of Gothenburg Gothenburg Sweden
2. APHP, North‐East‐Ile‐de‐France Neuromuscular Pathology Reference Center Henri‐Mondor University Hospital Paris France
3. The Mark Holland Metabolic Unit Salford Royal NHS Foundation Trust Salford UK
4. Department of Neurology Salford Royal NHS Foundation Trust Salford UK
5. Neuromed Campus Kepler University Hospital (Klinikum) Linz Austria
6. Department of Neurology Sahlgrenska University Hospital Gothenburg Sweden