1. Department of Palliative Medicine, Ludwig-Maximilian-University, Munich, Germany.
2. Department of Anaesthesiology, Munich University Hospital, Ludwig-Maximilian-University, Munich, Germany.
3. Department of Anaesthesiology, Technical University of Munich, Munich, Germany.
4. Institute for Ethics, History and Theory of Medicine, University of Munich, Munich, Germany.
5. Interdisciplinary Center for Palliative Medicine, University of Düsseldorf, Düsseldorf, Germany.