1. Department for Neurodegenerative Diseases and Geriatric Psychiatry, University Hospital Bonn, Bonn, Germany
2. Institute of General Practice, Working Group Medical Statistics and IT Infrastructure, Hannover Medical School, Hannover, Germany
3. Institute of Social Medicine, Occupational Health and Public Health, Medical Faculty, University of Leipzig, Leipzig, Germany
4. Institute of General Practice, Medical Faculty, Kiel University, Kiel, Germany
5. Institute of Primary Medical Care, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
6. Department of Health Economics and Health Services Research, Hamburg Center for Health Economics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
7. Central Institute of Mental Health, Medical Faculty Mannheim/Heidelberg University, Mannheim, Germany
8. Institute of General Practice (ifam), Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
9. Department of Psychiatry, Technical University Munich, Munich, Germany
10. DZNE, German Center for Neurodegenerative Diseases, Bonn, Germany