1. Cochrane Haematology, Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf; Faculty of Medicine and University Hospital Cologne, University of Cologne; Cologne Germany
2. Cochrane Cancer, Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf; Faculty of Medicine and University Hospital Cologne, University of Cologne; Cologne Germany
3. Cochrane Germany; Cochrane Germany Foundation; Freiburg Germany
4. Cochrane Haematology, Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf, Faculty of Medicine and University Hospital Cologne; University of Cologne; Cologne Germany
5. Department of Palliative Care, Medical Center - University of Freiburg; Faculty of Medicine, University of Freiburg; Freiburg Germany
6. Department for Anesthesiology and Intensive Care Medicine/ Department of Palliative Care; University Hospital of Jena; Jena Germany