1. Interdisciplinary Center for Palliative Medicine; Ludwig-Maximilians-University; Munich; Germany
2. Psychotherapist in private practice; Munich; Germany
3. Statistical Consulting Unit, Department of Statistics; Ludwig-Maximilians-University; Munich; Germany
4. Harlaching Hospital; Academic Teaching Hospital of the Ludwig-Maximilians-University; Munich; Germany
5. Department of Radiation Oncology; Ludwig-Maximilians-University; Munich; Germany
6. Centre Hospitalier Universitaire Vaudois, Service de Soins Palliatifs; University of Lausanne; Lausanne; Switzerland