1. Folkhälsan Research Center Helsinki Finland
2. Department of Medical Genetics, Medicum University of Helsinki Helsinki Finland
3. Department of Neurology, Neuromuscular Diseases Unit Hospital de la Santa Creu i Sant Pau Barcelona Spain
4. Biomedical Research Institute Sant Pau (IIB Sant Pau) Barcelona Spain
5. Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER) Madrid Spain
6. IGBMC (Institut de Génétique et de Biologie Moléculaire et Cellulaire) Université de Strasbourg Illkirch France
7. Department of Neurology, Neuromuscular Unit, Hospital Universitario 12 de Octubre, Research Institute imas12, Biomedical Network Research Centre on Rare Diseases (CIBERER) Instituto de Salud Carlos III Madrid Spain
8. Department of Precision Medicine University of Campania ‘Luigi Vanvitelli’ Naples Italy
9. Department of Neurology Vaasa Central Hospital Vaasa Finland