1. Department of Nuclear Medicine, University Hospital of Larissa, School of Medicine, University of Thessaly, Larissa, Greece
2. Memory & Cognitive Disorders Clinic, Department of Neurology, “G.Gennimatas” Hospital, Athens, Greece
3. Department of Nuclear Medicine, “Alexandra” University Hospital, Athens, Greece
4. Department of Radiology, University Hospital of Larissa, School of Medicine, University of Thessaly, Larissa, Greece
5. Department of Neurology, University Hospital of Larissa, School of Medicine, University of Thessaly, Larissa, Greece