1. Neurology Department, Hospital Universitario 12 de Octubre, Madrid, Spain
2. Nuclear Medicine Department, Hospital Universitario 12 de Octubre, Madrid, Spain
3. Group of Neurodegenerative Diseases, Hospital 12 de Octubre Research Institute (i+12), Madrid, Spain
4. Biomedical Research Networking Center in Neurodegenerative Diseases (CIBERNED), Madrid, Spain
5. Complutense University of Madrid, Madrid, Spain