1. Department of Neurology, University of California, Los Angeles, CA, USA
2. Laboratory of Neuro Imaging, University of California, Los Angeles, CA, USA
3. Oslo University Hospital, Department of Radiology and Nuclear Medicine, Rikshospitalet, Oslo, Norway
4. Monash University, Melbourne, VIC, Australia
5. Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
6. Department of Psychiatry, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, CA, USA
7. Centre for Age-Related Medicine, Stavanger University Hospital, Stavanger, Norway
8. Norwegian Center for Movement Disorders, Stavanger University Hospital, Stavanger, Norway
9. Department of Neurology, Stavanger University Hospital, Stavanger, Norway
10. Hospital; Karolinska Institute (KI), Department of Neurobiology, Care Sciences and Society, KI-Alzheimer Disease Research Center, Novum, Stockholm, Sweden
11. Department of Geriatric Psychiatry, Akershus University Hospital, Oslo, Norway