1. Institute of Medical Sociology, Health Services Research and Rehabilitation Science (IMVR) of the University of Cologne, Cologne, Germany
2. Department of Palliative Medicine, University Hospital Bonn, Germany
3. Department of Palliative Medicine, Medical Faculty RWTH Aachen University, Germany
4. Department for Palliative Medicine, CIO Aachen Bonn Cologne Düsseldorf, University Hospital Cologne, Germany