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