1. Faculty of Medicine and University Hospital Cologne, Department of Palliative Medicine, University of Cologne , Kerpener Str, 62, 50937 Cologne , Germany
2. Faculty of Human Sciences and Faculty of Medicine, Graduate School GROW – Gerontological Research on Well-Being, University of Cologne , Albertus-Magnus-Platz, 50923 Cologne , Germany
3. Institute for Health Economics and Clinical Epidemiology, University Hospital Cologne , Gleueler Str. 176-178, 50935 Cologne , Germany
4. Division of Health Planning and Promotion, Public Health Department Cologne , Neumarkt 15-21, 50667 Cologne , Germany
5. Institute for Sociology and Social Psychology, University of Cologne , Universitätsstraße 24, 50931 Cologne , Germany
6. Faculty of Medicine and University Hospital Cologne, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD), University of Cologne , Kerpener Str. 62, 50937 Germany
7. Faculty of Medicine and University Hospital Cologne, Center for Health Services Research, University of Cologne , Eupener Str. 129, 50933 Cologne , Germany