1. Palliative Care Unit, Department of Oncology, Hematology and BMT, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
2. Department of Medical Psychology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
3. Department of Palliative Medicine, University Medical Center Goettingen, Goettingen, Germany
4. Department of General Practice/Primary Care, University Medical Center Hamburg-Eppendorf, Hamburg, Germany