1. Department of Neurology, University Hospital “12 de Octubre”, Madrid, Spain
2. Centro de Investigaciín Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
3. The G.H. Sergievsky Center, College of Physicians and Surgeons, Columbia University, New York, NY, USA
4. Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
5. Taub Institute for Research on Alzheimer's Disease and the Aging Brain, College of Physicians and Surgeons, Columbia University, New York, NY, USA
6. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA
7. Neuroscience Laboratory, Research Center, University Hospital “12 de Octubre”, Madrid, Spain
8. Clinical Epidemiology Unit, University Hospital “12 de Octubre”, Madrid, Spain
9. Centro de Investigación Biomédica en Red sobre Epidemiología y Salud Pública (CIBERESP), Madrid, Spain