1. Department of Neurology, University Hospital “12 de Octubre”, Madrid, Spain
2. Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
3. Department of Medicine, Faculty of Medicine, Complutense University, Madrid, Spain
4. Unit of Vascular Risk Factors, National Center for Epidemiology, ISCIII, Madrid, Spain