1. Department of Neurology, University Clinic Hospital of Salamanca, Salamanca, Spain
2. Department of Neurology, University Hospital “12 de Octubre”, Madrid, Spain
3. Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
4. Department of Medicine, Complutense University, Madrid, Spain
5. Department of Psychooncology, Leicestershire Partnership Trust and University of Leicester, Leicester, UK
6. Department of Basic Psychology, Psychobiology and Behavioral Sciences Methodology, Faculty of Psychology, University of Salamanca, Salamanca, Spain