1. Institute of General Practice and Family Medicine, Jena University Hospital, Jena, Germany
2. Center for Clinical Studies, Jena University Hospital, Jena, Germany
3. Clinic for Palliative Medicine, University Medical Center Göttingen, Göttingen, Germany
4. BARMER, Wuppertal, Germany
5. Department of Palliative Care, Jena University Hospital, Jena, Germany