1. Department of Neurology; Philipps-University of Marburg; Marburg Germany
2. Chair of Geriatric Medicine; University Hospital Essen; Essen Germany
3. Geriatric Centre Haus Berge; Contilia GmbH; Essen Germany
4. Department of Neurology; Klinikum Christophsbad; Göppingen Germany
5. Department of Neurology; University Hospital Essen; Essen Germany
6. Department of Neurology, Medical Faculty; Heinrich-Heine-University Düsseldorf; Germany
7. Coordinating Center for Clinical Trials; Philipps-University Marburg; Germany
8. Department of Health Economics and Health Services Research, Hamburg Center for Health Economics; University Medical Center Hamburg-Eppendorf; Germany
9. Division of Preventive Medicine; Brigham & Women's Hospital; Boston, Massachusetts USA