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 Palliative Medicine; University Hospital Bonn; Bonn Germany
4. Department of Palliative Medicine; Centre of Palliative Care; Malteser Hospital Bonn/Rhein-Sieg Bonn Germany
5. Department of Palliative Medicine; Georg-August University Göttingen; Göttingen Germany