1. Department of General Practice and Health Services Research, Heidelberg University Hospital, Heidelberg, Germany
2. Department of Health Promotion, AOK Baden-Württemberg, Stuttgart, Germany
3. Research Group for Evidence-Based Public Health, Leibniz-Institute for Prevention Research and Epidemiology BIPS GmbH (BIPS), Bremen, Germany
4. Health Sciences Bremen, Institute for Public Health and Nursing Research, University of Bremen, Bremen, Germany