1. Institute for Health and Nursing Sciences, Medical Faculty Martin Luther University Halle‐Wittenberg Halle (Saale) Germany
2. Uniklinik RWTH Aachen Aachen Germany
3. School of Nursing Science, Faculty of Health Witten/Herdecke University Witten Germany
4. Institute of General Practice (ifam), Centre for Health and Society (chs) Medical Faculty of the Heinrich Heine University Düsseldorf Düsseldorf Germany