1. Department of Anesthesiology, Pain and Palliative Medicine, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands
2. Department of Radiation-Oncology and Palliative Medicine, University Hospital Gasthuisberg, Leuven, Belgium
3. Department of Oncology, Academic Unit of Supportive Care, School of Medicine and Biomedical Sciences, University of Sheffield, Sheffield, UK
4. Department of Palliative Medicine, University Hospital Bonn, Bonn, Germany
5. Department of Palliative Medicine, Centre of Palliative Care, Malteser Hospital Bonn/Rhein-Sieg, Bonn, Germany
6. Department of Palliative Medicine, Georg-August University Göttingen, Göttingen, Germany
7. Réseau de Santé, Paris Sud, Paris, France