1. Memory Clinic of Fundació ACE, Institut Català de Neurociències Aplicades, Barcelona, Spain
2. Nuclear Medicine Department, Hospital Universitari Vall d'Hebron, Barcelona, Spain
3. Hospital Universitari Vall d'Hebron-Institut de Recerca, Universitat Autònoma de Barcelona (VHIR-UAB), Barcelona, Spain
4. Psychiatry Department, Hospital Universitari Vall d'Hebron, CIBERSAM, Universitat Autònoma de Barcelona, Barcelona, Spain
5. Departments of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
6. Departments of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
7. Departments of Psychology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA