1. Department of Psychiatry and Psychotherapy, University Hospital Bonn, Bonn, Germany
2. German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
3. Department of Psychiatry and Psychotherapy, University of Cologne, Cologne, Germany
4. Department of Psychology, Humboldt-Universität zu Berlin, Berlin, Germany
5. Department of Psychology, University of Hamburg, Hamburg, Germany
6. Department for Neurodegenerative Diseases and Geriatric Psychiatry, University Hospital Bonn, Bonn, Germany