1. CINAC-Hospital Universitario HM Puerta del Sur; CEU-San Pablo University; Madrid Spain
2. Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
3. Neurosurgery Department, Hospital Universitario Ramon y Cajal; Madrid Spain
4. Neurology Division, Department of Clinical Neurosciences; University Hospital of Geneva; Switzerland