1. Department of Neurology, Fundación Jiménez Díaz, Madrid, Spain
2. Department of Neurology, Hospital Clínico Universitario San Carlos, Madrid, Spain
3. Department of Neurology, Fundación Hospital Alcorcón, Madrid, Spain
4. Department of Neurology, Hospital Virgen del Rocio, Seville, Spain
5. Department of Neurology, Hospital Virgen del Puerto, Plasencia, Spain
6. Department of Neurology, S. Michael's Hospital, Toronto, Ontario, Canada
7. Department of Neurology, Hospital Ruber Internacional, Madrid, Spain
8. Department of Pathology, Fundación Hospital Alcorcón, Madrid, Spain
9. Department of Neurology, Hospital Ramón y Cajal, Madrid, Spain
10. Secugen SL, Madrid, Spain