1. Department of Palliative Medicine, Faculty of Medicine and University Hospital, University of Cologne, Cologne, Germany
2. Institute of Medical Statistics and Computational Biology, Faculty of Medicine, University of Cologne, Cologne, Germany
3. Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD), Faculty of Medicine and University Hospital, University of Cologne, Cologne, Germany
4. Center for Health Services Research, Faculty of Medicine and University Hospital, University of Cologne, Cologne, Germany