1. Turku PET Centre, Turku University and Turku University Hospital Turku Finland
2. Neurocenter, Turku University Hospital and Clinical Neurosciences University of Turku Turku Finland
3. Department of Neurology, Helsinki University Hospital and Department of Clinical Neurosciences (Neurology) University of Helsinki Helsinki Finland
4. Department of Radiology University of Turku and Turku University Hospital Turku Finland
5. Department of Biostatistics University of Turku Turku Finland