1. Department of Palliative Medicine, West German Cancer Center, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
2. Institute for Artificial Intelligence in Medicine (IKIM), University of Duisburg-Essen, Essen, Germany
3. Department of Mathematics and Computer Science, University of Marburg, Marburg, Germany
4. Department of Palliative Care, West German Cancer Center, University Hospital Muenster, University of Muenster, Muenster, Germany