1 First Department of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Dusseldorf, University of Cologne, Cologne, Germany.
2 Mildred Scheel School of Oncology Aachen Bonn Cologne Dusseldorf (MSSO ABCD), Faculty of Medicine and University Hospital Cologne, Cologne, Germany.
3 Department of Palliative Care, University Hospital Jena, Jena, Germany.
4 Department of Internal Medicine II, University Hospital Jena, Jena, Germany.
5 Department of Palliative Medicine, Center for Integrated Oncology Aachen Bonn Cologne Dusseldorf, Faculty of Medicine and University Hospital Cologne, Cologne, Germany.