1. Interdisciplinary Palliative Care Unit, Department of Medicine, University Medical Center of the Johannes Gutenberg University, Mainz, Germany.
2. Community Service for Specialized Palliative Care, Hospice of Mainz, Mainz, Germany.
3. Institute for Medical Biometry, Epidemiology and Computer Science, Johannes Gutenberg University, Mainz, Germany.
4. Department of Anesthesiology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany.