1. Department of Neurology, University Hospital “12 de Octubre”, Spain
2. Department of Neurology, University Hospital “Gregorio Marañón”, Spain
3. Department of Neurology, University Hospital of Getafe, Spain
4. Department of Neurology, University Hospital “Principe de Asturias”, Spain
5. Department of Psycho-oncology, Leicestershire Partnership Trust and University of Leicester, UK
6. Department of Neurology, University Hospital “12 de Octubre”, Spain/Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Spain/Department of Medicine, Complutense University, Madrid, Spain