1. Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, and Mother-Child health (DINOGMI), University of Genoa, Italy
2. Clinical Psychology Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
3. Institute of Bioimaging and Molecular Physiology, Consiglio Nazionale delle Ricerche (CNR), Genoa, Italy
4. Institute of Cognitive Sciences and Technologies, Consiglio Nazionale delle Ricerche (CNR), Rome, Italy
5. Department of Nuclear Medicine, Karolinska Hospital, Stockholm, Sweden
6. Department of Health Sciences (DISSAL), University of Genoa, Italy
7. Nuclear Medicine Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
8. Medical Radiation Physics and Nuclear Medicine, Imaging and Physiology, Karolinska University Hospital, Stockholm, Sweden
9. National Institute for Nuclear Physics (INFN), Genoa, Italy
10. LENITEM Laboratory of Epidemiology and Neuroimaging, IRCCS S. Giovanni di Dio-FBF, Brescia, Italy
11. University Hospitals and University of Geneva, Geneva, Switzerland
12. Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Germany
13. Department of Psychiatry and Psychotherapy, Technische Universität München, Munich, Germany
14. German Center for Neurodegenerative Diseases (DZNE) Munich, Germany
15. Neuroepidemiology and Ageing Research Unit, School of Public Health, Faculty of Medicine, The Imperial College London of Science, Technology and Medicine, London, UK
16. Department of Nuclear Medicine, University Hospital of Cologne, Germany; previously at Department of Nuclear Medicine, Technische Universität, Munich, Germany
17. Department of Nuclear Medicine & PET Research, VU University Medical Center, Amsterdam, The Netherlands
18. APHM, CHU Timone, Service de Neurologie et Neuropsychologie, Aix-Marseille University, Marseille, France
19. APHM, CHU Timone, Service de Médecine Nucléaire, CERIMED, Institut Fresnel, CNRS, Ecole Centrale Marseille, Aix-Marseille University, France
20. Neurology Clinics, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
21. Section of Gerontology and Geriatrics, University of Perugia, Perugia, Italy
22. Department of Diagnostic Imaging, Nuclear Medicine Unit, Perugia General Hospital, Perugia, Italy