1. Department of Psychiatry and Psychotherapy, University Medical Center Goettingen (UMG), Georg-August-University, Goettingen, Germany
2. Department of Nuclear Medicine, University Medical Center Goettingen (UMG), Georg-August-University, Goettingen, Germany
3. German Center for Neurodegenerative Diseases (DZNE), Goettingen, Germany
4. Department of Medical Science, iBiMED, University of Aveiro, Portugal