1. Interdisciplinary Center for Palliative Medicine, CCC Mainfranken, University Hospital Wuerzburg, Julius-Maximilians-Universität Würzburg, Wuerzburg, Germany
2. Department of Palliative Medicine, CCC Erlangen—EMN, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
3. Heidelberg University Hospital, Department of Palliative Medicine, Heidelberg, Germany
4. West German Cancer Center, Department of Medical Oncology, University Hospital Essen, Essen, Germany