1. Institute of Social Medicine, Occupational Health and Public Health (ISAP), University of Leipzig, Leipzig, Germany
2. German Center for Neurodegenerative Diseases (DZNE), Site Rostock/Greifswald, Greifswald, Germany
3. Institute of General Practice, University of Kiel, Kiel, Germany
4. Institute of General Practice and Family Medicine, University Hospital of LMU Munich, Munich, Germany
5. Institute for General Practice, Work Group Medical Statistics and IT-Infrastructure, Hannover Medical School, Hannover, Germany
6. Department of Health Economics and Health Service Research, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
7. Department of Clinical Pharmacology and Pharmacoepidemiology, University Hospital Heidelberg, Heidelberg, Germany
8. Institute of General Practice and Family Medicine, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
9. Institute for Community Medicine, University Medicine Greifswald (UMG), Greifswald, Germany