1. Department of Palliative Medicine, Friedrich-Alexander-Universität Erlangen-Nürnberg, Comprehensive Cancer Center Erlangen-EMN, University Hospital Erlangen, Erlangen, Germany
2. Department of Palliative Medicine, University Hospital of Cologne and Centre for Integrated Oncology Cologne/Bonn, Bonn, Germany
3. Interdisciplinary Center for Palliative Medicine, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
4. Interdisciplinary Center for Palliative Medicine, Comprehensive Cancer Center Mainfranken, University Hospital of Würzburg, Würzburg, Germany