1. School of Public Health; Bielefeld University; Bielefeld Germany
2. German Center for Neurodegenerative Diseases (DZNE); Witten Germany
3. School of Nursing Science, Faculty of Health; Witten/Herdecke University; Witten Germany
4. Institute for Evidence in Medicine; Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg; Freiburg Germany
5. Cochrane Germany, Cochrane Germany Foundation; Freiburg Germany
6. General Practice; Hamburg Germany
7. Faculty of Nursing Science; PTVH Catholic University; Vallendar Germany
8. Institute for Health Services Research and Health Economics, Centre for Health and Society, Medical Faculty and University Hospital Düsseldorf; Heinrich-Heine University; Düsseldorf Germany