1. Neuromuscular Diseases Unit, European Reference Network on Rare Neuromuscular Diseases (ERN EURO‐NMD), Department of Neurology Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona Barcelona Spain
2. Department of Clinical Neurophysiology Hospital Vall d'Hebron, Universitat Autònoma de Barcelona Barcelona Spain
3. Department of Clinical and Molecular Genetics Hospital Vall d'Hebron, Universitat Autònoma de Barcelona Barcelona Spain