1. Institute of Health and Nursing Science Medical Faculty Martin Luther University Halle‐Wittenberg Halle (Saale) Germany
2. Nursing Research Unit Institute of Social Medicine & Epidemiology University of Lübeck Lübeck Germany
3. Institute of Nursing Science Medical Faculty University of Cologne Cologne Germany
4. School of Nursing Faculty of Health Witten/Herdecke University Witten Germany
5. Institute for Health Services Research and Health Economics Center for Health and Society Faculty of Medicine Heinrich‐Heine‐University Düsseldorf Düsseldorf Germany