1. Cellex, IDIBAPS, University of Barcelona-Hospital Clínic of Barcelona, Barcelona 08036, Spain
2. Centro de Investigación Biomédica en Red (CIBER) de Enfermedades Raras (CIBERER), Madrid 28029, Spain
3. Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London NW3 2PF, UK
4. Neurology Department, Hospital Clínic of Barcelona, Barcelona 08036, Spain