1. Department of Palliative Medicine, University of Cologne, Faculty of Medicine and University Hospital, Cologne, Germany
2. University of Cologne, Faculty of Medicine and University Hospital, Center for Integrated Oncology Aachen Bonn Cologne Dusseldorf (CIO ABCD), Germany
3. University of Cologne, Faculty of Medicine and University Hospital, Clinical Trials Center (ZKS), Germany
4. University of Cologne, Faculty of Medicine and University Hospital, Center for Health Services Research, Germany
5. Department I of Internal Medicine, University of Cologne, Faculty of Medicine and University Hospital, Cologne, Germany
6. Department of Palliative Medicine, Munich University Hospital, Munich, Germany